TaxFormFinder
Connecticut Amended Income Tax Return for Individuals
Extracted from PDF file 2023-connecticut-form-ct-1040x.pdf, last modified November 2023Amended Income Tax Return for Individuals
2023 Form CT-1040X Department of Revenue Services State of Connecticut (Rev. 12/23) 1040X 1223W 01 9999 Amended Connecticut Income Tax Return for Individuals File and pay Form CT‑1040X electronically using myconneCT at portal.ct.gov/DRS-myconneCT. 2023 For January 1 ‑ December 31, 2023, or other tax year beginning and ending M M - D D - Y Y Y Y Your first name Middle initial If joint return, spouse’s first name Last name Last name Mailing address (number and street) Your Social Security Number (SSN) Middle initial M M - D D - Y Y Y Y Deceased Deceased Spouse’s SSN Mailing address 2 (apartment number, PO Box) City, town, or post office State ZIP code City or town of residence if different from above Country code ZIP code Spouse’s name (if Married filing separately) Filing Status Head of Household Single Married Filing Jointly Qualifying Surviving Spouse Married Filing Separately On original return: On this return: Check the box below if you are amending your return as a result of federal or state audit changes to your income tax return or as a result of a timely-filed amended federal or state return. Enter the date of the federal or other state’s final determination below. See Instructions Page 1. Federal or state changes Final Determination Date: M M - D D - Y Y Y Y You must attach a copy of the IRS audit or other state’s results, federal Form 1040X, Form 1045, the other state’s amended return, supporting documentation, and proof of the final determination. Check the appropriate box to identify if you are attaching a completed: Form CT-1040 CRC, Claim of Right Credit Form CT-8379, Nonobligated Spouse Claim Form CT-19IT, Title 19 Status Release Federal Form 1310, Statement of Person Claiming Refund Due a Deceased Taxpayer Declaration: I declare under penalty of law that I have examined this return and all accompanying schedules and statements, including reporting and payment of any use tax due, and, to the best of my knowledge and belief, it is true, complete, and correct. I understand the penalty for willfully delivering a false return or document to the Department of Revenue Services (DRS) is a fine of not more than $5,000, or imprisonment for not more than five years, or both. The declaration of a paid preparer other than the taxpayer is based on all information of which the preparer has any knowledge. Your signature Date (MM-DD-YYYY) Home/cell telephone number Date (MM-DD-YYYY) Daytime telephone number Sign Here Spouse’s signature (if joint return) Keep a copy of this return Type or print paid preparer’s name for your records. Your email address Paid preparer’s signature Date (MM-DD-YYYY) Paid preparer’s PTIN Firm’s Federal Employer Identification Number (FEIN) Check if selfemployed Firm’s name, address, and ZIP code Make your check payable to Commissioner of Revenue Services. To ensure proper posting of your payment, write your Social Security Number(s) (SSN) (optional) and “2023 Form CT‑1040X” on your check. DRS may submit your check to your bank electronically. Telephone number Mail to: Department of Revenue Services PO Box 2935 Hartford CT 06104-2935 Visit us at portal.ct.gov/DRS for more information. Form CT-1040X Page 2 of 5 (Rev. 12/23) 1040X 1223W 02 9999 Your Social Security Number A. Original amount or as Income previously adjusted B. Net change increase C. Correct amount or (decrease) 1. Federal adjusted gross income from federal Form 1040, Line 11, or federal Form 1040‑SR, Line 11.......................................1. .00 2. Additions, if any: See instructions. ..................... 2. .00 3. Add Line 1 and Line 2.........................................3. .00 4. Subtractions, if any: See instructions. ................ 4. .00 5. Connecticut adjusted gross income: Subtract Line 4 from Line 3. ............................... 5. .00 Residents go to Line 10; Nonresidents and part-year residents go to Line 6. Nonresidents and Part-Year Residents Only 6. Enter your income from Connecticut sources from Schedule CT‑SI. If less than or equal to zero, enter “0.”.................................. 6. .00 7. Enter the greater of Line 5 or Line 6. If zero, go to Line 10 and enter “0.”....................... 7. .00 8. Income tax from Tax Calculation Schedule: See instructions. ................................................8. .00 9. Divide Line 6 by Line 5. If Line 6 is equal to or greater than Line 5, enter 1.0000................... 9. . . Tax 10. Income tax: See instructions. ........................... 10. .00 11. Credit for income taxes paid to qualifying jurisdictions: See instructions. Residents and part-year residents only ......................... 11. .00 12. Subtract Line 11 from Line 10........................... 12. .00 13. Connecticut alternative minimum tax from Form CT‑6251..................................................13. .00 14. Add Line 12 and Line 13...................................14. .00 15. Credit for property tax paid on your primary residence or motor vehicle, or both: Residents only, see instructions. .......... 15. .00 16. Subtract Line 15 from Line 14. If less than or equal to zero, enter “0.”................................ 16. .00 17. Total allowable credits from Schedule CT‑IT Credit, Part 1, Line 11............. 17. .00 18. Connecticut income tax: Subtract Line 17 from Line 16......................................................18. .00 19. Individual use tax: See instructions. .............. 19. .00 20. Total tax: Add Line 18 and Line 19.................. 20. .00 Continue on Page 3. Taxpayers must sign declaration on Page 1. Visit us at portal.ct.gov/DRS for more information. Form CT-1040X Page 3 of 5 (Rev. 12/23) 1040X 1223W 03 9999 Your Social Security Number A. Original amount or as previously adjusted B. Net change increase C. Correct amount or (decrease) 20a. Enter amounts from Line 20........................... 20a. .00 21. Connecticut tax withheld: Enter amount from Line 70......................................................21. .00 22. All 2023 estimated Connecticut income tax payments (including any overpayments applied from a prior year) and extension payments..........................................................22. .00 22a. Connecticut earned income tax credit: From Schedule CT‑EITC, Line 16. Schedule must be attached. Residents only................. 22a. .00 22b. Claim of right credit: From Form CT‑1040 CRC, Line 6. Form must be attached.....................................................22b. .00 22c. Pass‑Through Entity Tax Credit: From Schedule CT‑PE, Line 1. Schedule must be attached..................................................... 22c. .00 23. Amounts paid with original return, plus additional tax paid after it was filed: Do not include penalty and interest.................. 23. .00 Payments and refundable credits 24. Total payments and refundable credits: Add Lines 21, 22, 22a, 22b, 22c and 23..................................................................................................24. .00 25. Overpayment, if any, as shown on original return or as previously adjusted..........................................25. .00 26. Subtract Line 25 from Line 24.................................................................................................................26. .00 Refund 27. If Line 26 is greater than Line 20a, Column C, enter the amount overpaid. ..........................................27. .00 Amount You Owe 28. If Line 20a, Column C, is greater than Line 26 enter the amount of tax due..........................................28. .00 29. Interest: Multiply Line 28 by number of months or fraction of a month, then by 1% (.01).......................29. .00 30. Amount you owe with this return: Add Line 28 and Line 29.....................................Amount you owe 30. .00 Reason(s) for amending return: Enter the line number for each item you are changing and give the reason for each change in the space below. Attach supporting forms and schedules for items changed. Write your name and SSN(s) on all attachments. Visit us at portal.ct.gov/DRS for more information. Form CT-1040X Page 4 of 5 (Rev. 12/23) 1040X 1223W 04 9999 Your Social Security Number Schedule 1 - Modifications to Federal Adjusted Gross Income - Enter all amounts as positive numbers. Additions to Federal Adjusted Gross Income 31. Interest on state and local government obligations other than Connecticut. .................................................... 31. 32. Mutual fund exempt‑interest dividends from non‑Connecticut state or municipal government obligations other than Connecticut. .................................................................................................................. 32. 33. Taxable amount of lump-sum distributions from qualified plans not included in federal adjusted gross income. ................................................................................................................................................... 33. .00 34. Beneficiary’s share of Connecticut fiduciary adjustment: Enter only if greater than zero. ................................ 34. .00 35. Loss on sale of Connecticut state and local government bonds. ..................................................................... 35. 36. Section 168(k) federal bonus depreciation deduction allowed for property placed in service during this year. ................................................................................................................................................ 36. .00 .00 .00 .00 36a. 80% of Section 179 federal deduction. See instructions. ............................................................................... 36a. .00 .37. .00 38. Total additions: Add Lines 31 through 37. Enter here and on Page 2, Line 2, Column C. ......................... 38. .00 37. Other ‑ specify. Subtractions From Federal Adjusted Gross Income 39. Interest on U.S. government obligations. ......................................................................................................... 39. .00 40. Exempt dividends from certain qualifying mutual funds derived from U.S. government obligations. ............... 40. .00 41. Social Security benefit adjustment from Social Security Benefit Adjustment Worksheet. ................................ 41. .00 42. Refunds of state and local income taxes. ......................................................................................................... 42. .00 43. Tier 1 and Tier 2 railroad retirement benefits and supplemental annuities. ...................................................... 43. .00 44. Military retirement pay. ..................................................................................................................................... 44. .00 45. 50% of income received from the Connecticut Teachers’ Retirement System. ................................................ 45. .00 46. Beneficiary’s share of Connecticut fiduciary adjustment: Enter only if less than zero.. .................................... 46. .00 47. Gain on sale of Connecticut state and local government bonds. ..................................................................... 47. .00 48. Connecticut Higher Education Trust (CHET) contributions made in 2023 or an excess carried forward from a prior year. See instructions. Enter CHET account number: ... 48. Do not add spaces or dashes. .00 .00 .00 48a. 25% of Section 168(k) federal bonus depreciation deduction added back in preceding four years................ 48a. 48b. Pension or annuity income. See instructions. ................................................................................................ 48b. 48c. Ordinary and necessary business expenses for taxpayers licensed under Chapter 420f or 420h that are not claimed for federal income tax purposes. .................................................................................................48c. 49. .00 .00 50. Total subtractions: Add Lines 39 through 49. Enter here and on Page 2, Line 4, Column C. .......................50. .00 49. Other - specify: Do not include out-of-state income. Schedule 2 - Credit for Income Taxes Paid to Qualifying Jurisdictions - Residents and Part-Year Residents Only See instructions for Form CT‑1040 or Form CT‑1040NR/PY. You must attach a copy of your return filed with the qualifying jurisdiction(s) or your credit will be disallowed. 51. Modified Connecticut Adjusted Gross Income. .................................................................... 51. Column A Name For each column, enter the following: .00 Column B Code Name 52. Enter qualifying jurisdiction’s name and two‑letter code. ................................. 52. 53. Non‑Connecticut income included on Line 51 and reported on a qualifying jurisdiction’s income tax return from Schedule 2 Worksheet. .............. 53. Code .00 55. Income tax liability: Subtract Line 15, Column C, from Line 10, Column C. ............... 55. .00 .00 56. Multiply Line 54 by Line 55. .............................................................................. 56. .00 .00 57. Income tax paid to a qualifying jurisdiction. ...................................................... 57. .00 .00 58. Enter the lesser of Line 56 or Line 57. ............................................................. 58. .00 .00 54. Divide Line 53 by Line 51. May not exceed 1.0000. ......................................... 54. . 59. Total credit: Add Line 58, all columns. Enter here and on Line 11, Column C. .................... 59. Visit us at portal.ct.gov/DRS for more information. .00 . .00 Form CT-1040X Page 5 of 5 (Rev. 12/23) 1040X 1223W 05 9999 Your Social Security Number Schedule 3 - Property Tax Credit - (Connecticut full-year residents only.) See instructions. Qualifying Property Description of Property If primary residence, enter street address. If motor vehicle, enter year, make, and model. Name of Connecticut Tax Town or District Date(s) Paid (MM-DD-YYYY) Amount Paid 60. Primary Residence 60. .00 61. Auto 1 61. .00 62. Auto 2 - Married filing 62. .00 jointly or qualifying surviving spouse only. 63. Total property tax paid: Add Lines 60, 61, and 62. 63. 64. Maximum property tax credit allowed. 64. 65. Enter the lesser of Line 63 or Line 64. 65. 66. Enter the decimal amount for your filing status and Connecticut AGI from the 2023 Property Tax Credit Table. If zero, enter the amount from Line 65 on Line 68. 66. 67. Multiply Line 65 by Line 66. 67. 68. Subtract Line 67 from Line 65. Enter here and on Line 15, Column C. Attach Schedule 3 to your return or your credit will be disallowed. 68. .00 300 .00 .00 . .00 .00 Schedule 4 - Individual Use Tax - Do you owe use tax? Complete the Connecticut Individual Use Tax Worksheet in the Connecticut Resident Tax Information Return Instructions to calculate your use tax liability. 69a. Total use tax due at 1%: From Connecticut Individual Use Tax Worksheet, Section A, Column 7 69a. .00 69b. Total use tax due at 6.35%: From Connecticut Individual Use Tax Worksheet, Section B, Column 7 69b. .00 69c. Total use tax due at 7.75%: From Connecticut Individual Use Tax Worksheet, Section C, Column 7 69c. .00 69d. Total use tax due at 2.99%: From Connecticut Individual Use Tax Worksheet, Section D, Column 7 69d. .00 69. .00 69. Individual use tax: Add Lines 69a through 69d. If no use tax is due, enter “0.” Enter here and on Line 19, Column C. Withholding Schedule: Only enter information from your Forms W‑2, 1099, and Schedules CT K‑1 if Connecticut income tax was withheld. Column A: Employer Federal ID Number Do not include dashes. Schedule CT K-1 Column B: CT Wages, Tips, etc. Column C: CT Income Tax Withheld Check box at left if from Schedule CT K‑1. 70a. .00 .00 70b. .00 .00 70c. .00 .00 70d. .00 .00 70e. .00 .00 .00 .00 70f. Enter additional Connecticut withholding from Supplemental Schedule CT‑1040WH, Line 3. 70. Total Connecticut income tax withheld: Enter here and on Line 21, Column C. Visit us at portal.ct.gov/DRS for more information. Department of Revenue Services State of Connecticut Form CT-1040X Instructions Purpose: Use this form to amend a previously-filed 2023 Connecticut income tax return for individuals. This form may not be used to amend any other year’s return. Do not use this form to amend Form CT‑1041 or Form CT‑1065/CT-1120SI. Please note that each form is year specific. To prevent any delay in processing your return, the correct year’s form must be submitted to DRS. Do not use staples. Visit the Department of Revenue Services website at portal.ct.gov/DRS-myconneCT to file Form CT-1040X electronically using myconneCT. If Form CT‑1040X is filed to request an overpayment of Connecticut income tax refunded or credited, it must be filed before the Connecticut statute of limitations expires. Generally, the Connecticut statute of 2023 limitations for refunding or crediting any Connecticut income tax overpayment expires three years after the due date of the return, but if a timely request for an extension of time to file a return was filed, the statute of limitations expires three years after the extended due date of the return or three years after the date of filing the return, whichever is earlier. If you were required to file an amended return, but failed to do so, a penalty may be imposed. Interest will also be assessed on any additional Connecticut income tax not paid on or before the due date. If you are filing Form CT‑1040X due to federal or another state’s changes or corrections to your federal or other state’s income tax return, you must check the box labeled Federal or state changes and enter the date of the final determination on Form CT‑1040X, Page 1. You must file Form CT-1040X in the following circumstances: 1. The IRS or federal courts change or correct your federal income tax return and the change or correction results in your Connecticut income tax being overpaid or underpaid. File Form CT-1040X no later than 90 days after the final determination date. If you file Form CT-1040X no later than 90 days after the date of the final determination, any Connecticut income tax overpayment resulting from the final determination will be refunded or credited to you even if the Connecticut statute of limitations has otherwise expired. 2. You filed a timely amended federal income tax return and the amendment results in your Connecticut income tax being overpaid or underpaid. File Form CT-1040X no later than 90 days after the final determination date. If you file Form CT-1040X no later than 90 days after the date of the final determination, any Connecticut income tax overpayment resulting from filing the timely amended federal income tax return will be refunded or credited to you even if the Connecticut statute of limitations has otherwise expired. 3. You claimed a credit for income tax paid to a qualifying jurisdiction on your original income tax return and the tax officials or courts of the qualifying jurisdiction made a change or correction to your income tax return and the change or correction results in your Connecticut income tax being overpaid or underpaid (by increasing or decreasing the amount of your allowable credit). File Form CT-1040X no later than 90 days after the final determination date. If you file Form CT-1040X no later than 90 days after the date of the final determination and you claimed credit for income tax paid to a qualifying jurisdiction on your original income tax return, any Connecticut income tax overpayment resulting from the final determination will be refunded or credited to you even if the Connecticut statute of limitations has otherwise expired. 4. You claimed a credit for income tax paid to a qualifying jurisdiction on your original income tax return and you filed a timely amended income tax return with that qualifying jurisdiction and the amendment results in your Connecticut income tax being overpaid or underpaid (by increasing or decreasing the amount of your allowable credit). File Form CT-1040X no later than 90 days after the final determination date. If you file Form CT-1040X no later than 90 days after the date of the final determination on a timely-amended return with a qualifying jurisdiction and you claimed credit for income tax paid to a qualifying jurisdiction on your original income tax return, any Connecticut income tax overpayment resulting from the final determination will be refunded or credited to you even if the Connecticut statute of limitations has otherwise expired. 5. If none of the above circumstances apply, but you made a mistake or omission on your Connecticut income tax return and the mistake or omission results in your Connecticut income tax being overpaid or underpaid. File Form CT-1040X no later than three years after the due date of your return, or if you filed a timely request for an extension of time to file, three years after the date of filing the return or three years after the extended due date, whichever is earlier. Do not file Form CT‑1040X for any of the following reasons: • To have an overpayment refunded instead of applied to next year’s estimated tax or to change your contributions to designated charities. The elections that you made on your original return cannot be changed by filing Form CT‑1040X. • To amend your Connecticut income tax return for an earlier year to claim a credit for income tax paid on income included in your Connecticut adjusted gross income for that year and repaid in a later taxable year. File Form CT‑1040 CRC, Claim of Right Credit, with your Connecticut income tax return for the later taxable year. CT‑1040X Instructions (Rev. 12/23) Financial Disability: If you are financially disabled, as defined in IRC § 6511(h)(2), the time for having an overpayment of Connecticut income tax refunded or credited to you is extended for as long as you are financially disabled. You are considered financially disabled if you are unable to manage your own affairs by reason of a medically determinable physical or mental impairment that has lasted or can be expected to last for a continuous period of not less than 12 months. You are not considered financially disabled during any period that your spouse or any other person is authorized to act on your behalf in financial matters. See Policy Statement 2001(14), Claims for Refund Made by Financially Disabled Individuals. Page 1 of 7 Completing Form CT‑1040X Line numbers on Form CT‑1040X may be different from the line numbers on your original return. Step 1: Check the box labeled Federal or state changes on Form CT‑1040X, Page 1 if you are amending your return as a result of the following: • An IRS or federal court change or correction made to your federal return; • If tax officials or courts of a qualifying jurisdiction made a change or correction to an income tax return filed with that jurisdiction and for which you claimed a credit in your Connecticut return for taxes paid to that jurisdiction; or • A timely-filed amended federal or other state’s income tax return. Enter the final determination date as listed on the document received from the IRS or by the other jurisdiction. Step 2: Refer to your original return and identify all the changes that need to be made. Step 3: Find the corresponding line items on Form CT‑1040X. Step 4: Complete Schedules 1, 2, 3, and 4. Enter the corrected amounts for each line. If you are not making corrections, enter the amounts reported on your original return. Step 5: Use Column A to enter the amounts shown on your original or previously-adjusted return. Step 6: Use Column B to enter the net increase or decrease for each line you are changing. Step 7: Explain each change in the space provided on Form CT‑1040X, Page 3. Step 8: Use Column C to report the corrected amounts for each line. If there is no change, enter the amount from Column A in Column C. Form CT‑1040X Instructions Filing Status Generally, your filing status must match your federal income tax filing status for the year. However, when one spouse is a Connecticut resident or a nonresident and the other spouse is a part‑year resident, each spouse who is required to file a Connecticut income tax return must file as married filing separately. When one spouse is a Connecticut resident and the other is a nonresident, each spouse who is required to file a Connecticut income tax return must file as married filing separately, unless they file jointly for federal income tax purposes and they elect to be treated as if both were Connecticut residents for the entire taxable year. See Special Rules for Married Individuals at portal.ct.gov/DRS/Individuals/Individual-Income-Tax. Line 2 and Line 4: Enter the amount from Schedule 1, Line 38, on Line 2, Column C, and the amount from Schedule 1, Line 50, on Line 4, Column C. Lines 6 through 9: Nonresidents and Part‑Year Residents Only: Refer to your previously-filed Form CT‑1040NR/PY when completing this section. Attach a copy of your corrected Schedule CT‑SI, Nonresident or Part‑Year Resident Schedule of Income from Connecticut Sources. Part‑Year Residents: Also attach a copy of your corrected Schedule CT‑1040AW, Part‑Year Resident Income Allocation. Line 8: Calculate the tax on the amount you entered on Line 7, Column C, using the 2023 Tax Calculation Schedule on Instructions Page 3. Enter the result on Line 8, Column C. Line 10: Residents: Calculate the tax on the amount you entered on Line 5, Column C, using the 2023 Tax Calculation Schedule on Instructions Page 3. Enter the result in Column C. Nonresidents and Part-Year Residents: Multiply Line 9, Column C, by Line 8, Column C. Enter the result in Column C. Line 11: Residents and Part-Year Residents: Enter the amount from Schedule 2, Line 59, in Column C. See the return instructions to Form CT‑1040 or Form CT‑1040NR/PY at portal.ct.gov/DRS/ Individuals/Individual-Income-Tax. CT‑1040X Instructions (Rev. 12/23) Line 13: If changes are being made to your Connecticut Alternative Minimum Tax, you must complete a corrected Form CT‑6251, Connecticut Alternative Minimum Tax Return - Individuals. Write the word “Amended” across the top and attach it to Form CT‑1040X. Line 15: Residents: Enter the amount from Schedule 3, Line 68, in Column C. You must attach Schedule 3 to your return or your credit will be disallowed. Nonresidents and Part-Year Residents: Enter “0” in Column C. Line 17: If changes are being made to your allowable credits, you must complete a corrected Schedule CT‑IT Credit, Income Tax Credit Summary. Write the word “Amended” across the top and attach it to Form CT‑1040X. You must also attach a corrected Form CT‑8801, Credit for Prior Year Connecticut Minimum Tax for Individuals, Trusts, and Estates if the prior year alternative minimum tax credit is being changed. If you are filing a corrected Form CT‑8801, write the word “Amended” across the top and attach it to Form CT‑1040X. Line 19: Enter the amount from Schedule 4, Line 69, in Column C. Line 21: If changes are being made to your Connecticut income tax withholding, complete the Withholding Schedule on Form CT‑1040X, Page 5, and enter the total from Line 70 in Column C. You must complete all columns or your withholding will be disallowed. Do not send Forms W‑2 or 1099, or Schedules CT K‑1. If you have more than five federal Forms W‑2 or 1099, or Schedules CT K‑1, you must complete Supplemental Schedule CT‑1040WH and attach it to the back of your amended Connecticut income tax return. Enter the total from Supplemental Schedule CT‑1040WH, Line 3, on Line 70f, Column C. Line 22a: Connecticut Earned Income Tax Credit: Complete Schedule CT‑EITC, Connecticut Earned Income Tax Credit, to calculate your earned income tax credit. Enter the amount from Schedule CT‑EITC, Line 16. You must attach a copy of your schedule or the credit will be disallowed. Only full‑year residents can claim the Connecticut earned income tax credit (CT EITC). Part-year residents and nonresidents do not qualify for the credit. Line 22b: Claim of Right Credit: Complete Form CT‑1040 CRC, Claim of Right Credit, to calculate the amount of your Connecticut Claim of Right Credit if you have a claim of right credit for federal tax purposes. Enter the amount from Form CT‑1040 CRC, Line 6. You must check off the box for filing Form CT‑1040 CRC on CT‑1040X (Page 1) and attach a copy of Form CT‑1040 CRC to the back of Form CT‑1040X. Line 22c: Pass‑Through Entity Tax Credit: Complete Schedule CT‑PE, Pass‑Through Entity Tax Credit for Individuals, to calculate the amount of your Connecticut Pass‑Through Entity Tax Credit if you have a Schedule CT K‑1, Member’s Share of Certain Connecticut Items, or Schedule CT‑1041 K‑1, Beneficiary’s Share of Certain Connecticut Items. Enter the amount from Schedule CT‑PE, Line 1. You must attach a copy of Schedule CT‑PE to the back of Form CT‑1040X. Interest Interest at 1% per month or fraction of a month will continue to accrue from the original due date until the tax is paid in full. A month is measured from the sixteenth day of the first month to the fifteenth day of the next month. Any fraction of a month is considered a whole month. Schedules 1 Through 4 If you are making corrections to any of these schedules (Modifications to Federal Adjusted Gross Income, Credit for Income Taxes Paid to Qualifying Jurisdictions, Property Tax Credit, and Individual Use Tax), refer to the Form CT‑1040 or Form CT‑1040NR/PY return instructions at portal.ct.gov/DRS/Individuals/Individual-Income-Tax. Enter the corrected amounts for each line. If you are not making corrections, enter the amounts reported on your original return. Enter all amounts as positive numbers. Page 2 of 7 Form CT-1040 TCS 2023 Tax Calculation Schedule Tax Calculation Schedule P! TI Calculate your tax liability instantly by visiting myconneCT at portal.ct.gov/DRS-myconneCT. Below the Individuals panel on the myconneCT homepage, select View Tax Calculators, then select Income Tax Calculator. Complete Lines 2, 4, 5, 6, and 8, using Tables A through E. 1. Residents of Connecticut, enter Connecticut Adjusted Gross Income (AGI) from Form CT‑1040X, Line 5 (Page 2). Non‑Residents or Part‑Year residents, enter Connecticut AGI from Form CT‑1040X, Line 7 (Page 2). Non‑Resident or Part‑Year filers must enter income from Connecticut sources if it exceeds Connecticut AGI. 1. .00 2. Enter the exemption amount from Table A, Personal Exemptions. If zero, enter “0.” 2. .00 3. Connecticut Taxable Income: Subtract Line 2 from Line 1. If less than zero, enter “0.” 3. .00 4. Enter amount from Table B, Initial Tax Calculation. 4. .00 5. Enter amount from Table C, 3% Tax Rate Phase-Out Add-Back. If zero, enter “0.” 5. .00 6. Enter amount from Table D, Tax Recapture. If zero, enter “0.” 6. .00 7. Add Lines 4, 5, and 6. 7. .00 8. Enter the decimal amount from Table E, Personal Tax Credits. If zero, enter “0.” 8. 9. Multiply the amount on Line 7 by the decimal amount on Line 8. 9. .00 10. .00 10. Connecticut Income Tax: Subtract Line 9 from Line 7. Residents: Enter here and on Form CT‑1040X, Line 10. Nonresidents and Part‑Year Residents: Enter here and on Form CT‑1040X, Line 8. . Table A - Personal Exemptions for 2023 Taxable Year Enter the exemption amount on the Tax Calculation Schedule, Line 2 and continue to Line 3. Use the filing status you report on your 2023 Amended Connecticut income tax return and your Connecticut AGI (Tax Calculation Schedule, Line 1) to determine your personal exemption. Single Married Filing Jointly or Qualifying Surviving Spouse Connecticut AGI More Than Less Than or Equal To Connecticut AGI Exemption More Than Less Than or Equal To Married Filing Separately Connecticut AGI Exemption More Than Less Than or Equal To Head of Household Connecticut AGI Exemption More Than Less Than or Equal To Exemption $ 0 $30,000 $15,000 $ 0 $48,000 $24,000 $ 0 $24,000 $12,000 $ 0 $38,000 $19,000 $30,000 $31,000 $14,000 $48,000 $49,000 $23,000 $24,000 $25,000 $11,000 $38,000 $39,000 $18,000 $31,000 $32,000 $13,000 $49,000 $50,000 $22,000 $25,000 $26,000 $10,000 $39,000 $40,000 $17,000 $32,000 $33,000 $12,000 $50,000 $51,000 $21,000 $26,000 $27,000 $ 9,000 $40,000 $41,000 $16,000 $33,000 $34,000 $11,000 $51,000 $52,000 $20,000 $27,000 $28,000 $ 8,000 $41,000 $42,000 $15,000 $34,000 $35,000 $10,000 $52,000 $53,000 $19,000 $28,000 $29,000 $ 7,000 $42,000 $43,000 $14,000 $35,000 $36,000 $ 9,000 $53,000 $54,000 $18,000 $29,000 $30,000 $ 6,000 $43,000 $44,000 $13,000 $36,000 $37,000 $ 8,000 $54,000 $55,000 $17,000 $30,000 $31,000 $ 5,000 $44,000 $45,000 $12,000 $37,000 $38,000 $ 7,000 $55,000 $56,000 $16,000 $31,000 $32,000 $ 4,000 $45,000 $46,000 $11,000 $38,000 $39,000 $ 6,000 $56,000 $57,000 $15,000 $32,000 $33,000 $ 3,000 $46,000 $47,000 $10,000 $39,000 $40,000 $ 5,000 $57,000 $58,000 $14,000 $33,000 $34,000 $ 2,000 $47,000 $48,000 $ 9,000 $40,000 $41,000 $ 4,000 $58,000 $59,000 $13,000 $34,000 $35,000 $ 1,000 $48,000 $49,000 $ 8,000 $41,000 $42,000 $ 3,000 $59,000 $60,000 $12,000 $35,000 and up $ 0 $49,000 $50,000 $ 7,000 $42,000 $43,000 $ 2,000 $60,000 $61,000 $11,000 $50,000 $51,000 $ 6,000 $43,000 $44,000 $ 1,000 $61,000 $62,000 $10,000 $51,000 $52,000 $ 5,000 $44,000 and up $ 0 $62,000 $63,000 $ 9,000 $52,000 $53,000 $ 4,000 $63,000 $64,000 $ 8,000 $53,000 $54,000 $ 3,000 $64,000 $65,000 $ 7,000 $54,000 $55,000 $ 2,000 $65,000 $66,000 $ 6,000 $55,000 $56,000 $ 1,000 $66,000 $67,000 $ 5,000 $56,000 and up $ 0 $67,000 $68,000 $ 4,000 $68,000 $69,000 $ 3,000 $69,000 $70,000 $ 2,000 $70,000 $71,000 $ 1,000 $71,000 and up $ 0 CT‑1040X Instructions (Rev. 12/23) Page 3 of 7 Table B - Initial Tax Calculation for 2023 Taxable Year Calculate your tax liability instantly by visiting myconneCT at portal.ct.gov/DRS-myconneCT. Below the Individuals panel on the myconneCT homepage, select View Tax Calculators, then select Income Tax Calculator. P! TI Enter the initial tax calculation amount on the Tax Calculation Schedule, Line 4 and continue to Line 5. Use the filing status you report on your 2023 Amended Connecticut income tax return and your Connecticut AGI. This is the initial tax calculation of your tax liability. It does not include personal tax credits, the 3% phase-out or tax recapture. Single or Married Filing Separately If the amount on Line 3 of the Tax Calculation Schedule is: Less than or equal to:...................................................... $ 10,000................ 3.00% More than $10,000, but less than or equal to.................. $ 50,000................ $300 plus 5.0% of the excess over $10,000 More than $50,000, but less than or equal to.................. $100,000............... $2,300 plus 5.5% of the excess over $50,000 More than $100,000, but less than or equal to................ $200,000............... $5,050 plus 6.0% of the excess over $100,000 More than $200,000, but less than or equal to................ $250,000............... $11,050 plus 6.5% of the excess over $200,000 More than $250,000, but less than or equal to................ $500,000............... $14,300 plus 6.9% of the excess over $250,000 More than $500,000......................................................................................$31,550 plus 6.99% of the excess over $500,000 t Enter result on Tax Calculation Schedule, Line 4 (on Instructions Page 3) and continue to Line 5. u Single or Married Filing Separately Examples: Line 3 is $13,000, Line 4 is $450 $13,000 - $10,000 $3,000 X .05 $300 + $150 = = = $3,000 $150 $450 Line 3 is $525,000, Line 4 is $33,298 $525,000 - $500,000 $25,000 x .0699 $31,550 + $1,748 = = = $25,000 $1,748 $33,298 Married Filing Jointly/Qualifying Surviving Spouse If the amount on Line 3 of the Tax Calculation Schedule is: Less than or equal to:...................................................... $ 20,000................ 3.00% More than $20,000, but less than or equal to.................. $100,000............... $600 plus 5.0% of the excess over $20,000 More than $100,000, but less than or equal to................ $200,000............... $4,600 plus 5.5% of the excess over $100,000 More than $200,000, but less than or equal to................ $400,000............... $10,100 plus 6.0% of the excess over $200,000 More than $400,000, but less than or equal to................ $500,000............... $22,100 plus 6.5% of the excess over $400,000 More than $500,000, but less than or equal to................ $1,000,000............ $28,600 plus 6.9% of the excess over $500,000 More than $1,000,000...................................................................................$63,100 plus 6.99% of the excess over $1,000,000 t Enter result on Tax Calculation Schedule, Line 4 (on Instructions Page 3) and continue to Line 5. u Married Filing Jointly/Qualifying Surviving Spouse Examples: Line 3 is $22,500, Line 4 is $725 $22,500 - $20,000 $2,500 x .05 $600 + $125 = = = $2,500 $125 $725 Line 3 is $1,100,000, Line 4 is $70,090 $1,100,000 - $1,000,000 $100,000 x .0699 $63,100 + $6,990 = $100,000 = $6,990 = $70,090 Head of Household If the amount on Line 3 of the Tax Calculation Schedule is: Less than or equal to:...................................................... $ 16,000................ 3.00% More than $16,000, but less than or equal to.................. $ 80,000................ $480 plus 5.0% of the excess over $16,000 More than $80,000, but less than or equal to.................. $160,000............... $3,680 plus 5.5% of the excess over $80,000 More than $160,000, but less than or equal to................ $320,000............... $8,080 plus 6.0% of the excess over $160,000 More than $320,000, but less than or equal to................ $400,000............... $17,680 plus 6.5% of the excess over $320,000 More than $400,000, but less than or equal to................ $800,000............... $22,880 plus 6.9% of the excess over $400,000 More than $800,000......................................................................................$50,480 plus 6.99% of the excess over $800,000 t Enter result on Tax Calculation Schedule, Line 4 (on Instructions Page 3) and continue to Line 5. u Head of Household Examples: Line 3 is $20,000, Line 4 is $680 $20,000 - $16,000 $4,000 x .05 $480 + $200 CT‑1040X Instructions (Rev. 12/23) = = = $4,000 $200 $680 Line 3 is $825,000, Line 4 is $52,228 $825,000 - $800,000 $25,000 x .0699 $50,480 + $1,748 = = = $25,000 $1,748 $52,228 Page 4 of 7 P! TI Calculate your tax liability instantly by visiting myconneCT at portal.ct.gov/DRS-myconneCT. Below the Individuals panel on the myconneCT homepage, select View Tax Calculators, then select Income Tax Calculator. Table C - 3% Tax Rate Phase-Out Add-Back Enter the phase-out amount on the Tax Calculation Schedule, Line 5 and continue to Line 6. Use the filing status you report on your 2023 Amended Connecticut income tax return and your Connecticut AGI (Tax Calculation Schedule, Line 1) to determine your phase-out level and the additional amount of tax you are required to include in your tax calculation. Single Married Filing Jointly or Qualifying Surviving Spouse Connecticut AGI More Than Less Than or Equal To $ 0 $ 56,500 $ 61,500 $ 66,500 $ 71,500 $ 76,500 $ 81,500 $ 86,500 $ 91,500 $ 96,500 $101,500 Connecticut AGI 3% Phase-Out $ 56,500 $ 61,500 $ 66,500 $ 71,500 $ 76,500 $ 81,500 $ 86,500 $ 91,500 $ 96,500 $101,500 and up CT‑1040X Instructions (Rev. 12/23) $ 0 $ 20 $ 40 $ 60 $ 80 $100 $120 $140 $160 $180 $200 More Than Less Than or Equal To $ 0 $100,500 $100,500 $105,500 $105,500 $110,500 $110,500 $115,500 $115,500 $120,500 $120,500 $125,500 $125,500 $130,500 $130,500 $135,500 $135,500 $140,500 $140,500 $145,500 $145,500 and up Married Filing Separately Connecticut AGI 3% Phase-Out $ 0 $ 40 $ 80 $120 $160 $200 $240 $280 $320 $360 $400 More Than Less Than or Equal To Head of Household Connecticut AGI 3% Phase-Out $ 0 $50,250 $50,250 $52,750 $52,750 $55,250 $55,250 $57,750 $57,750 $60,250 $60,250 $62,750 $62,750 $65,250 $65,250 $67,750 $67,750 $70,250 $70,250 $72,750 $72,750 and up $ 0 $ 20 $ 40 $ 60 $ 80 $100 $120 $140 $160 $180 $200 More Than Less Than or Equal To $ 0 $ 78,500 $ 78,500 $ 82,500 $ 82,500 $ 86,500 $ 86,500 $ 90,500 $ 90,500 $ 94,500 $ 94,500 $ 98,500 $ 98,500 $102,500 $102,500 $106,500 $106,500 $110,500 $110,500 $114,500 $114,500 and up 3% Phase-Out $ 0 $ 32 $ 64 $ 96 $128 $160 $192 $224 $256 $288 $320 Page 5 of 7 P! TI Calculate your tax liability instantly by visiting myconneCT at portal.ct.gov/DRS-myconneCT. Below the Individuals panel on the myconneCT homepage, select View Tax Calculators, then select Income Tax Calculator. Table D - Tax Recapture Enter the recapture amount on the Tax Calculation Schedule, Line 6 and continue to Line 7. Use the filing status you report on your 2023 Amended Connecticut income tax return and your Connecticut AGI (Tax Calculation Schedule, Line 1) to determine your recapture amount. Single or Married Filing Separately Connecticut AGI More Than $ 0 $200,000 $205,000 $210,000 $215,000 $220,000 $225,000 $230,000 $235,000 $240,000 $245,000 $250,000 $255,000 $260,000 $265,000 $270,000 $275,000 $280,000 $285,000 $290,000 $295,000 $300,000 $305,000 $310,000 $315,000 $320,000 $325,000 $330,000 $335,000 $340,000 $345,000 $500,000 $505,000 $510,000 $515,000 $520,000 $525,000 $530,000 $535,000 $540,000 Less Than or Equal To $200,000 $205,000 $210,000 $215,000 $220,000 $225,000 $230,000 $235,000 $240,000 $245,000 $250,000 $255,000 $260,000 $265,000 $270,000 $275,000 $280,000 $285,000 $290,000 $295,000 $300,000 $305,000 $310,000 $315,000 $320,000 $325,000 $330,000 $335,000 $340,000 $345,000 $500,000 $505,000 $510,000 $515,000 $520,000 $525,000 $530,000 $535,000 $540,000 and up CT‑1040X Instructions (Rev. 12/23) Married Filing Jointly or Qualifying Surviving Spouse Connecticut AGI Recapture Amount More Than Less Than or Equal To $ 0 $ 0 $400,000 $ 90 $400,000 $410,000 $ 180 $410,000 $420,000 $ 270 $420,000 $430,000 $ 360 $430,000 $440,000 $ 450 $440,000 $450,000 $ 540 $450,000 $460,000 $ 630 $460,000 $470,000 $ 720 $470,000 $480,000 $ 810 $480,000 $490,000 $ 900 $490,000 $500,000 $ 990 $500,000 $510,000 $1,080 $510,000 $520,000 $1,170 $520,000 $530,000 $1,260 $530,000 $540,000 $1,350 $540,000 $550,000 $1,440 $550,000 $560,000 $1,530 $560,000 $570,000 $1,620 $570,000 $580,000 $1,710 $580,000 $590,000 $1,800 $590,000 $600,000 $1,890 $600,000 $610,000 $1,980 $610,000 $620,000 $2,070 $620,000 $630,000 $2,160 $630,000 $640,000 $2,250 $640,000 $650,000 $2,340 $650,000 $660,000 $2,430 $660,000 $670,000 $2,520 $670,000 $680,000 $2,610 $680,000 $690,000 $2,700 $690,000 $1,000,000 $2,750 $1,000,000 $1,010,000 $2,800 $1,010,000 $1,020,000 $2,850 $1,020,000 $1,030,000 $2,900 $1,030,000 $1,040,000 $2,950 $1,040,000 $1,050,000 $3,000 $1,050,000 $1,060,000 $3,050 $1,060,000 $1,070,000 $3,100 $1,070,000 $1,080,000 $3,150 $1,080,000 and up Head of Household Connecticut AGI Recapture Amount More Than Less Than or Equal To $ 0 $ 0 $320,000 $ 180 $320,000 $328,000 $ 360 $328,000 $336,000 $ 540 $336,000 $344,000 $ 720 $344,000 $352,000 $ 900 $352,000 $360,000 $1,080 $360,000 $368,000 $1,260 $368,000 $376,000 $1,440 $376,000 $384,000 $1,620 $384,000 $392,000 $1,800 $392,000 $400,000 $1,980 $400,000 $408,000 $2,160 $408,000 $416,000 $2,340 $416,000 $424,000 $2,520 $424,000 $432,000 $2,700 $432,000 $440,000 $2,880 $440,000 $448,000 $3,060 $448,000 $456,000 $3,240 $456,000 $464,000 $3,420 $464,000 $472,000 $3,600 $472,000 $480,000 $3,780 $480,000 $488,000 $3,960 $488,000 $496,000 $4,140 $496,000 $504,000 $4,320 $504,000 $512,000 $4,500 $512,000 $520,000 $4,680 $520,000 $528,000 $4,860 $528,000 $536,000 $5,040 $536,000 $544,000 $5,220 $544,000 $552,000 $5,400 $552,000 $800,000 $5,500 $800,000 $808,000 $5,600 $808,000 $816,000 $5,700 $816,000 $824,000 $5,800 $824,000 $832,000 $5,900 $832,000 $840,000 $6,000 $840,000 $848,000 $6,100 $848,000 $856,000 $6,200 $856,000 $864,000 $6,300 $864,000 and up Recapture Amount $ 0 $ 140 $ 280 $ 420 $ 560 $ 700 $ 840 $ 980 $1,120 $1,260 $1,400 $1,540 $1,680 $1,820 $1,960 $2,100 $2,240 $2,380 $2,520 $2,660 $2,800 $2,940 $3,080 $3,220 $3,360 $3,500 $3,640 $3,780 $3,920 $4,060 $4,200 $4,280 $4,360 $4,440 $4,520 $4,600 $4,680 $4,760 $4,840 $4,920 Page 6 of 7 P! TI Calculate your tax liability instantly by visiting myconneCT at portal.ct.gov/DRS-myconneCT. Below the Individuals panel on the myconneCT homepage, select View Tax Calculators, then select Income Tax Calculator. Table E - Personal Tax Credits for 2023 Taxable Year Enter the decimal amount on the Tax Calculation Schedule, Line 8 and continue to Line 9. Use the filing status you report on your 2023 Amended Connecticut income tax return and your Connecticut AGI (Tax Calculation Schedule, Line 1) to determine your personal credit decimal amount. Single Married Filing Jointly or Qualifying Surviving Spouse Connecticut AGI More Than Less Than or Equal To $15,000 $18,800 $19,300 $19,800 $20,300 $20,800 $21,300 $21,800 $22,300 $25,000 $25,500 $26,000 $26,500 $31,300 $31,800 $32,300 $32,800 $33,300 $60,000 $60,500 $61,000 $61,500 $62,000 $62,500 $63,000 $63,500 $64,000 $64,500 $18,800 $19,300 $19,800 $20,300 $20,800 $21,300 $21,800 $22,300 $25,000 $25,500 $26,000 $26,500 $31,300 $31,800 $32,300 $32,800 $33,300 $60,000 $60,500 $61,000 $61,500 $62,000 $62,500 $63,000 $63,500 $64,000 $64,500 and up CT‑1040X Instructions (Rev. 12/23) Connecticut AGI Decimal Amount More Than Less Than or Equal To .75 $24,000 $30,000 .70 $30,000 $30,500 .65 $30,500 $31,000 .60 $31,000 $31,500 .55 $31,500 $32,000 .50 $32,000 $32,500 .45 $32,500 $33,000 .40 $33,000 $33,500 .35 $33,500 $40,000 .30 $40,000 $40,500 .25 $40,500 $41,000 .20 $41,000 $41,500 .15 $41,500 $50,000 .14 $50,000 $50,500 .13 $50,500 $51,000 .12 $51,000 $51,500 .11 $51,500 $52,000 .10 $52,000 $96,000 .09 $96,000 $96,500 .08 $96,500 $97,000 .07 $97,000 $97,500 .06 $97,500 $98,000 .05 $98,000 $98,500 .04 $98,500 $99,000 .03 $99,000 $99,500 .02 $99,500 $100,000 .01 $100,000 $100,500 .00 $100,500 and up Married Filing Separately Connecticut AGI Decimal Amount .75 .70 .65 .60 .55 .50 .45 .40 .35 .30 .25 .20 .15 .14 .13 .12 .11 .10 .09 .08 .07 .06 .05 .04 .03 .02 .01 .00 More Than Less Than or Equal To $12,000 $15,000 $15,000 $15,500 $15,500 $16,000 $16,000 $16,500 $16,500 $17,000 $17,000 $17,500 $17,500 $18,000 $18,000 $18,500 $18,500 $20,000 $20,000 $20,500 $20,500 $21,000 $21,000 $21,500 $21,500 $25,000 $25,000 $25,500 $25,500 $26,000 $26,000 $26,500 $26,500 $27,000 $27,000 $48,000 $48,000 $48,500 $48,500 $49,000 $49,000 $49,500 $49,500 $50,000 $50,000 $50,500 $50,500 $51,000 $51,000 $51,500 $51,500 $52,000 $52,000 $52,500 $52,500 and up Head of Household Connecticut AGI Decimal Amount .75 .70 .65 .60 .55 .50 .45 .40 .35 .30 .25 .20 .15 .14 .13 .12 .11 .10 .09 .08 .07 .06 .05 .04 .03 .02 .01 .00 More Than Less Than or Equal To $19,000 $24,000 $24,000 $24,500 $24,500 $25,000 $25,000 $25,500 $25,500 $26,000 $26,000 $26,500 $26,500 $27,000 $27,000 $27,500 $27,500 $34,000 $34,000 $34,500 $34,500 $35,000 $35,000 $35,500 $35,500 $44,000 $44,000 $44,500 $44,500 $45,000 $45,000 $45,500 $45,500 $46,000 $46,000 $74,000 $74,000 $74,500 $74,500 $75,000 $75,000 $75,500 $75,500 $76,000 $76,000 $76,500 $76,500 $77,000 $77,000 $77,500 $77,500 $78,000 $78,000 $78,500 $78,500 and up Decimal Amount .75 .70 .65 .60 .55 .50 .45 .40 .35 .30 .25 .20 .15 .14 .13 .12 .11 .10 .09 .08 .07 .06 .05 .04 .03 .02 .01 .00 Page 7 of 7
Form CT-1040X
More about the Connecticut Form CT-1040X Individual Income Tax Amended Return TY 2023
We last updated the Amended Income Tax Return for Individuals in January 2024, so this is the latest version of Form CT-1040X, fully updated for tax year 2023. You can download or print current or past-year PDFs of Form CT-1040X directly from TaxFormFinder. You can print other Connecticut tax forms here.
eFile your Connecticut tax return now 
eFiling is easier, faster, and safer than filling out paper tax forms. File your Connecticut and Federal tax returns online with TurboTax in minutes. FREE for simple returns, with discounts available for TaxFormFinder users!
File Now with TurboTaxOther Connecticut Individual Income Tax Forms:
TaxFormFinder has an additional 85 Connecticut income tax forms that you may need, plus all federal income tax forms.
| Form Code | Form Name |
|---|---|
| Form CT-1040 | Connecticut Resident Income Tax Return |
| Tax Instruction Booklet | Form CT-1040 Instruction Booklet |
| CT-1040ES (Current Year) | Estimated Connecticut Income Tax Payment Coupon for Individuals |
| Form CT-1040 EXT | Application for Extension of Time to File Connecticut Income Tax Return for Individuals |
| CT-1040NR/PY Instructions | Tax Instruction Booklet: CT-1040 for Nonresidents/Part-Year Residents |
View all 86 Connecticut Income Tax Forms
Form Sources:
Connecticut usually releases forms for the current tax year between January and April. We last updated Connecticut Form CT-1040X from the Department of Revenue Services in January 2024.
Form CT-1040X is a Connecticut Individual Income Tax form. An amended tax return is used to correct errors or omissions in a previously-filed tax return. While taxpayers will not generally be punished simply for correcting an error in a previous return, errors that resulted in an underpayment of owed tax can sometimes result in penalties or interest owed.
About the Individual Income Tax
The IRS and most states collect a personal income tax, which is paid throughout the year via tax withholding or estimated income tax payments.
Most taxpayers are required to file a yearly income tax return in April to both the Internal Revenue Service and their state's revenue department, which will result in either a tax refund of excess withheld income or a tax payment if the withholding does not cover the taxpayer's entire liability. Every taxpayer's situation is different - please consult a CPA or licensed tax preparer to ensure that you are filing the correct tax forms!
Historical Past-Year Versions of Connecticut Form CT-1040X
We have a total of thirteen past-year versions of Form CT-1040X in the TaxFormFinder archives, including for the previous tax year. Download past year versions of this tax form as PDFs here:
2016 Form CT-1040X
CT-1040X, 2016 Amended Connecticut Income Tax Return for Individuals
2015 Form CT-1040X
CT-1040X, 2015 Amended Connecticut Income Tax Return for Individuals
2014 Form CT-1040X
CT-1040X, 2014 Amended Connecticut Income Tax Return for Individuals
2013 Form CT-1040X
CT-1040X, 2013 Amended Connecticut Income Tax Return for Individuals
2012 Form CT-1040X
CT-1040X, 2012 Amended Connecticut Income Tax Return for Individuals
2011 Form CT-1040X
CT-1040X, 2011 Amended Connecticut Income Tax Return for Individuals
TaxFormFinder Disclaimer:
While we do our best to keep our list of Connecticut Income Tax Forms up to date and complete, we cannot be held liable for errors or omissions. Is the form on this page out-of-date or not working? Please let us know and we will fix it ASAP.