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Connecticut Connecticut Resident Income Tax Return
Extracted from PDF file 2023-connecticut-form-ct-1040.pdf, last modified December 2023Connecticut Resident Income Tax Return
2023 Form CT-1040 Department of Revenue Services State of Connecticut (Rev. 12/23) 1040 1223W 01 9999 Connecticut Resident Income Tax Return CT-1040 File and pay Form CT‑1040 electronically using myconneCT at portal.ct.gov/DRS-myconneCT. 2023 For January 1 ‑ December 31, 2023, or other tax year beginning 1 Print your SSN, name, mailing address, and city or town here. Filing Status - Check only one box. and ending M M - D D - Y Y Y Y Single Head of household Married filing jointly Qualifying surviving spouse M M - D D - Y Y Y Y Married filing separately Enter spouse’s name here and SSN below. Spouse’s Social Security Number Your Social Security Number Check if deceased Check if deceased Your first name MI Last name (If two last names, insert a space between names.) Suffix (Jr./Sr.) If joint return, spouse’s first name MI Last name (If two last names, insert a space between names.) Suffix (Jr./Sr.) Mailing address (number and street) Mailing address 2 (apartment number, PO Box) City, town, or post office (If town is two words, leave a space between the words.) State Enter city or town of residence if different from above. ZIP code ZIP code Country code Check the appropriate box to identify if you are attaching a completed: Clip check here. Do not use staples. Do not send Forms W-2 or 1099, or Schedules CT K‑1. 2 Form CT-2210, Underpayment of Estimated Income Tax by Individuals, Trusts, and Estates, checking any box from Part 1. Schedule CT-Dependent (Complete this schedule if you claimed dependents on your federal Form 1040.) Federal Form 1310, Statement of Person Claiming Refund Due a Deceased Taxpayer Form CT-19IT, Title 19 Status Release Form CT-1040 CRC, Claim of Right Credit Form CT-8379, Nonobligated Spouse Claim Whole Dollars Only 1. Federal adjusted gross income from federal Form 1040, Line 11, or federal Form 1040‑SR, Line 11 1. .00 2. Additions to federal adjusted gross income from Schedule 1, Line 38 2. .00 3. Add Line 1 and Line 2. 3. .00 4. Subtractions from federal adjusted gross income from Schedule 1, Line 50 4. .00 5. Connecticut adjusted gross income: Subtract Line 4 from Line 3. 5. .00 6. Income tax from tax tables or Tax Calculation Schedule: See instructions. 6. .00 7. Credit for income taxes paid to qualifying jurisdictions from Schedule 2, Line 59 7. .00 8. Subtract Line 7 from Line 6. If Line 7 is greater than Line 6, enter “0.” 8. .00 9. Connecticut alternative minimum tax from Form CT‑6251 9. .00 10. Add Line 8 and Line 9. 11. Credit for property taxes paid on your primary residence, motor vehicle, or both: 10. .00 11. .00 12. Subtract Line 11 from Line 10. If less than zero, enter “0.” 12. .00 13. Total allowable credits from Schedule CT‑IT Credit, Part 1, Line 11 13. .00 14. Connecticut income tax: Subtract Line 13 from Line 12. If less than zero, enter “0.” 14. .00 15. Individual use tax from Schedule 4, Line 69: If no tax is due, enter “0.” 15. .00 16. Add Line 14 and Line 15. 16. .00 Attach completed Schedule 3 on Page 4, Line 68 or your credit will be disallowed. Due date: April 15, 2024 - Attach a copy of all applicable schedules and forms to this return. Do not use staples. Taxpayers must sign declaration on reverse side. Complete return in blue or black ink only. 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 the Department of Revenue Services (DRS). Visit us at portal.ct.gov/DRS for more information. Form CT-1040 Page 2 of 4 (Rev. 12/23) 1040 1223W 02 9999 3 Your Social Security Number 17. Enter amount from Line 16. .00 17. Withholding Schedule: You must complete Columns A, B, and C or your withholding will be disallowed. Column A - Employer’s federal ID No. from Box b Column B of W‑2, or payer’s federal ID No. from Form 1099 Connecticut wages, tips, etc. Forms W-2 and 1099 Information Only enter information from your Forms W‑2 and 1099 if Connecticut income tax was withheld. Column C Connecticut income tax withheld .00 18a. 18a. 18b. 18b. .00 18c. 18c. .00 18d. 18d. .00 18e. 18e. .00 .00 18f. Additional CT withholding from Supplemental Schedule CT‑1040WH 18f. 18. Total Connecticut income tax withheld: Add amounts in Column C, Lines 18a, 18b, 18c, 18d, 18e, and 18f, and enter here. 18. .00 19. All 2023 estimated tax payments and any overpayments applied from a prior year 19. 22. Overpayment: If Line 21 is more than Line 17, subtract Line 17 from Line 21. 22. 23. Amount of Line 22 overpayment you want applied to your 2024 estimated tax 23. .00 .00 .00 .00 .00 .00 .00 .00 24. 24a. .00 .00 25. .00 20. Payments made with Form CT‑1040 EXT (request for extension of time to file) 20. 20a. Connecticut earned income tax credit: From Schedule CT‑EITC, Line 16. 20a. 20b. Claim of right credit: From Form CT‑1040 CRC, Line 6. 20b. 20c. Pass-Through Entity Tax Credit: From Schedule CT‑PE, Line 1. Schedule must be attached. 20c. 4 21. Total payments and refundable credits: Add Lines 18, 19, 20, 20a, 20b and 20c. 24. Amount of Line 22 overpayment you want applied as a CHET contribution from Schedule CT‑CHET, Line 4. 24a. Total contributions of refund to designated charities from Schedule 5, Line 70 25. Refund: Subtract Lines 23, 24, and 24a from Line 22. For direct deposit, complete Lines 25a, 25b, and 25c. Direct deposit is not available to first-time filers. 25a. Checking Savings 21. 25c. Account number 25b. Routing number 25d. Will this refund go to a bank account outside the U.S.? If you do not elect direct deposit, a refund check will be issued and processing may be delayed. 5 6 26. Tax due: If Line 17 is more than Line 21, subtract Line 21 from Line 17. 26. 27. If late: Enter penalty. Multiply Line 26 by 10% (.10). 27. 28. If late: Enter interest. Multiply Line 26 by number of months or fraction of a month late, then by 1% (.01). 28. 29. Interest on underpayment of estimated tax from Form CT‑2210: See instructions. 29. 30. Total amount due: Add Lines 26 through 29. 30. Yes .00 .00 .00 .00 .00 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 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 Sign Here Keep a copy of this return for your records. Date (MMDDYYYY) Home/cell telephone number Spouse’s signature (if joint return) Date (MMDDYYYY) Daytime telephone number Your email address Date (MMDDYYYY) Paid preparer’s signature Telephone number Type or print paid preparer’s name Firm’s Federal Employer Identification Number (FEIN) Firm’s name, address, and ZIP code Paid preparer’s PTIN Check if self-employed Third Party Designee - Complete the following to authorize DRS to contact another person about this return. Designee’s name Telephone number Personal identification number (PIN) Complete applicable schedules on Pages 3 and 4 and send all four pages of the return to DRS. Visit us at portal.ct.gov/DRS for more information. Form CT-1040 Page 3 of 4 (Rev. 12/23) 1040 1223W 03 9999 Your Social Security Number Schedule 1 - Modifications to Federal Adjusted Gross Income Enter all items as positive numbers. See instructions. 31. Interest on state and local government obligations other than Connecticut 32. Mutual fund exempt-interest dividends from non-Connecticut state or municipal government obligations 33. Taxable amount of lump-sum distributions from qualified plans not included in federal adjusted gross income 31. .00 32. .00 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 36. Section 168(k) federal bonus depreciation deduction allowed for property placed in service during this year. 35. .00 36. .00 36a. .00 37. Other - specify 37. .00 38. Total additions: Add Lines 31 through 37. Enter here and on Line 2. 38. .00 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: See Social Security Benefit Adjustment Worksheet instructions. 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. 47. Gain on sale of Connecticut state and local government bonds 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: Do not add spaces or dashes. 47. .00 .00 48. .00 48a. 25% of Section 168(k) federal bonus depreciation deduction added back in preceding four years. 48a. .00 48b. Pension or annuity income. See instructions. 48b. .00 36a. 80% of Section 179 federal deduction. See instructions. 48c. Ordinary and necessary business expenses for taxpayers licensed under Chapter 420f or 420h that are not claimed for federal income tax purpose 48c. .00 49. Other - specify: Do not include out of state income 49. .00 50. Total subtractions: Add Lines 39 through 49. Enter here and on Line 4. 50. .00 Schedule 2 - Credit for Income Taxes Paid to Qualifying Jurisdictions You must attach a copy of your return filed with the qualifying jurisdiction(s) or your credit will be disallowed. See instructions. .00 51. Modified Connecticut adjusted gross income. .................................................................... 51. Column A Name Column B Code Name Code 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. 54. Divide Line 53 by Line 51. May not exceed 1.0000. .................................. 54. .00 . .00 . 55. Income tax liability. Subtract Line 11 from Line 6. .......................................... 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 59. Total credit: Add Line 58, all columns. Enter here and on Line 7. ........................................... 59. .00 Complete applicable schedules on Page 4 and send all four pages of the return to DRS. Visit us at portal.ct.gov/DRS for more information. Form CT-1040 Page 4 of 4 (Rev. 12/23) 1040 1223W 04 9999 Your Social Security Number Schedule 3 - Property Tax Credit - See instructions. Qualifying Property Name of Connecticut Tax Town or District Description of Property If primary residence, enter street address. If motor vehicle, enter year, make, and model. Date(s) Paid (MMDDYYYY) 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. .00 63. 300 64. Maximum property tax credit allowed. 64. .00 .00 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 Property Tax Credit Table. If zero, enter the amount from Line 65 on Line 68. 66. 67. Multiply Line 65 by Line 66. 67. .00 68. Subtract Line 67 from Line 65. Enter here and on Line 11. Attach Schedule 3 to your return or your credit will be disallowed. 68. .00 . Failure to report and pay use tax is subject to as much as a $5,000 fine, imprisonment for as much as 5 years, or both. Schedule 4 - Individual Use Tax Do you owe use tax for online or other purchases where you paid no sales tax? See instructions. Complete the Connecticut Individual Use Tax Worksheet to calculate your use tax liability. See instructions. 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. Individual use tax: Add Lines 69a through 69d. If no use tax is due, you must enter “0.” Enter here and on Line 15. 69. .00 70a. AIDS Research 70a. .00 70b. Organ Transplant 70b. .00 70c. Endangered Species/Wildlife 70c. .00 70d. Breast Cancer Research 70d. .00 70e. Safety Net Services 70e. .00 70f. Military Relief 70f. .00 70g. CHET Baby Scholars 70g. .00 70h. Mental Health Community Investment Account 70h. .00 70. .00 Schedule 5 - Contributions to Designated Charities - See instructions. 70. Total Contributions: Add Lines 70a through 70h. Enter amount here and on Line 24a. Complete and send all four pages of the return to DRS. Use the correct mailing address for returns with a payment or requesting a refund. For all tax forms with payment: Department of Revenue Services PO Box 2977 Hartford CT 06104‑2977 Make your check payable to: For refunds and all other tax forms without payment: Commissioner of Revenue Services To ensure proper posting, write your Department of Revenue Services SSN(s) (optional) and “2023 Form PO Box 2976 CT‑1040” on your check. Hartford CT 06104‑2976 Visit us at portal.ct.gov/DRS for more information.
Form CT-1040
More about the Connecticut Form CT-1040 Individual Income Tax Tax Return TY 2023
Form CT-1040 is the general Connecticut income tax return for all in-state filers.
We last updated the Connecticut Resident Income Tax Return in January 2024, so this is the latest version of Form CT-1040, fully updated for tax year 2023. You can download or print current or past-year PDFs of Form CT-1040 directly from TaxFormFinder. You can print other Connecticut tax forms here.
Related Connecticut Individual Income Tax Forms:
TaxFormFinder has an additional 85 Connecticut income tax forms that you may need, plus all federal income tax forms. These related forms may also be needed with the Connecticut Form CT-1040.
| Form Code | Form Name |
|---|---|
| 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 |
| Form CT-1040ES | Estimated Connecticut Income Tax Payment Coupon for Individuals |
| Form CT-1040V | Connecticut Electronic Filing Payment Voucher |
| Form CT-1040NR-PY | Nonresident/Part-Year Resident Tax Return |
| CT-1040 | Individual Income tax Return (Resident) |
| Form CT-1040X | Amended Income Tax Return for Individuals |
| Form CT-1040CRC | Claim of Right Credit |
| Form CT-1040 TCS | Tax Calculation Schedule |
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-1040 from the Department of Revenue Services in January 2024.
Form CT-1040 is a Connecticut Individual Income Tax form. Like the Federal Form 1040, states each provide a core tax return form on which most high-level income and tax calculations are performed. While some taxpayers with simple returns can complete their entire tax return on this single form, in most cases various other additional schedules and forms must be completed, depending on the taxpayer's individual situation, to create a complete income tax return package.
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-1040
We have a total of thirteen past-year versions of Form CT-1040 in the TaxFormFinder archives, including for the previous tax year. Download past year versions of this tax form as PDFs here:
2016 Form CT-1040
CT-1040, Connecticut Resident Income Tax Return
2015 Form CT-1040
CT-1040 Form, 2015 Connecticut Resident Income Tax Return
2014 Form CT-1040
CT-1040, 2014 Connecticut Resident Income Tax Return
2013 Form CT-1040
CT-1040, 2013 Connecticut Resident Income Tax Return
2012 Form CT-1040
CT-1040, 2012 Connecticut Resident Income Tax Return
2011 Form CT-1040
CT-1040 20120105.indd
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