Federal Amended Quarterly Federal Excise Tax Return

Amended Quarterly Federal Excise Tax Return
Form 720-X (Rev. October 2025)
Form

720-X

Amended Quarterly Federal Excise Tax Return

(Rev. October 2025)
Department of the Treasury
Internal Revenue Service

OMB No. 1545-1759

Go to www.irs.gov/Form720X for the latest information.
Use to correct a previously filed Form 720.

Employer identification number (EIN)

Name (as shown on Form 720)

Number and street (If you have a P.O. box, see instructions.)

Room/suite no.

Telephone number (optional)

City or town

State/province

Country

1

ZIP/foreign code

Adjustments to Liability Reported on Previously Filed Forms 720
(a)
Quarter
ending

2

(b)
IRS No.

(c)
Tax

(d)
Tax as originally reported
on Form 720 or as
previously adjusted

(e)
Adjusted tax

(f)
Change
(subtract col. (d)
from col. (e))

(e)
Adjusted credit

(f)
Change
(subtract col. (e)
from col. (d))

Adjustments to Form 720, Schedule C (see instructions for allowable adjustments)
(a)
Quarter
ending

3

(b)
CRN

(c)
Credit

(d)
Credit as originally
reported on Form 720 or
as previously adjusted

Statement in Support of Adjustment. For tax decreases only, indicate below the statement that applies to the adjustment.
a

For IRS No. 22, 26, 28, or 27, only collectors using the regular method for deposits check the box below.
The claimant has repaid the amount of the tax to the person from whom it was collected or
has obtained the consent of that person to the allowance of the adjustment.
b For all other IRS Nos. except for 16, 18, 21, 98, 19, 29, 31, 30, 53, 133, 64, 125, 51, 117, 20, and
150, or if the tax was based on use for 71, 79, 112, 118, 120–124, 61, and 101, check the box
below.
The claimant hasn’t included the tax in the price of the article and hasn’t collected the tax
from the purchaser, has repaid the tax to the ultimate purchaser, or has attached the written
consent of the ultimate purchaser to the allowance of the adjustment.
4

Total adjustments. Combine all amounts in column (f) for lines 1 and 2 and enter the amount
here
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
If the result is a balance due, pay the amount with this return. Enclose a check or money order with Form 720-X and make it
payable to “United States Treasury.” Write on the check or money order: “Form 720-X,” your name, address, EIN, and the date
Form 720-X was signed. Complete line 6.
If the result is an overpayment, complete lines 5 and 6.

5

a
b

Check if you want the overpayment:
Refunded to you.
Applied to your next Form 720. Enter quarter ending date.
See Form 720 for how to apply your overpayment.

For Paperwork Reduction Act Notice, see the Instructions for Form 720.

Cat. No. 32661B

Form 720-X (Rev. 10-2025) Created 9/10/25

Page 2

Form 720-X (Rev. 10-2025)

6

Explanation of adjustments. See the instructions for line 6 for requirements. Attach additional sheets with your name and EIN
if more space is needed.

Under penalties of perjury, I declare that I have examined this return, including accompanying schedules and statements, and to the best of my knowledge and
belief, it is true, correct, and complete. Declaration of preparer (other than taxpayer) is based on all information of which preparer has any knowledge.

Sign
Here

Date

Signature

Title

Name of signer

Paid
Preparer
Use Only

Preparer’s name

Preparer’s signature

Date

Check
if
self-employed

Firm’s name

Firm’s EIN

Firm’s address

Phone no.

PTIN

Form 720-X (Rev. 10-2025)

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Form 720-X (Rev. 10-2025)

Section references are to the Internal Revenue Code unless otherwise noted.

Future Developments
For the latest information about developments related to Form 720-X and its
instructions, such as legislation enacted after they were published, go to
www.irs.gov/Form720X.

General Instructions
What’s New
Section 6426 and 6427 Expiration
Biodiesel and renewable diesel. The section 6426/6427 credits/payments
for mixtures of biodiesel, renewable diesel, agri-biodiesel (allowed by section
6426(c)(5)) expired for sales, uses, or removals after 2024.
Sustainable aviation fuel (SAF) credit. The section 6426(k) credit for SAF
doesn’t expire until September 30, 2025. However, the section 6427
allowance for direct refund payments (allowed for excess section 6426
credits that exceed section 4081 fuel tax liability) is expired after 2024, even
for the still allowable section 6426 SAF credit. Additionally, the section 6426
SAF credit is not allowed for any SAF for which a section 45Z credit is
allowable, on or after July 4, 2025.
Alternative fuel credit and alternative fuel mixture credit. The section
6426/6427 credits/payments for alternative fuel and alternative fuel mixtures
expired for sales, uses, or removals after 2024.

Purpose of Form
Use Form 720-X to make adjustments to liability reported on Forms 720 you
have filed for previous quarters. Don’t use Form 720-X to make changes to
claims made on Form 720, Schedule C, except for the section 4051(d) tire
credit and section 6426 credits.
Caution: You must include in gross income (income tax return) any
overpayment from line 4 of Form 720-X if you took a deduction on the
income tax return that included the amount of the taxes and that deduction
reduced the income tax liability. See Pub. 510, Excise Taxes, for more
information.

When To File
Generally, adjustments that decrease your tax liability for a prior quarter
must be made within 3 years from the time the return was filed or 2 years
from the time the tax was paid, whichever is later.

Where To File
If you’re filing Form 720-X separately, send Form 720-X to:
Department of the Treasury
Internal Revenue Service
Cincinnati, OH 45999-0009
Otherwise, attach Form 720-X to your next Form 720.

Private delivery services. You can use certain private delivery services
(PDS) designated by the IRS to meet the “timely mailing as timely filing”
rule for tax returns. Go to www.irs.gov/PDS for the current list of
designated services. The PDS can tell you how to get written proof of
the mailing date. For the IRS mailing address to use if you’re using PDS,
go to www.irs.gov/PDSstreetAddresses.
Caution: Private delivery services can’t deliver items to P.O. boxes. You
must use the U.S. Postal Service to mail any item to an IRS P.O. box
address.

Specific Instructions
P.O. box. If the post office doesn’t deliver mail to the street address and you
have a P.O. box, show the box number instead of the street address.
Foreign address. Don’t abbreviate the country name. Follow the country’s
practice for entering the postal code and the name of the province, country,
or state.

Line 1
Report each adjustment separately on line 1. You can use line 6 for your
explanation or you can attach additional sheets with your name and EIN as
needed.
Column (a). Enter the quarter ending date of the Form 720 you’re amending.
If you’re amending more than one quarter, make sure each quarter is clearly
identified. Enter the date in the MMDDYYYY format. For example, if you’re
adjusting the first quarter return for 2025, enter “03312025.”
Column (d). Enter the tax amount for the IRS No. entered in column (b) as
originally reported on Form 720 or as later adjusted by you or the IRS.

Column (e). Enter the adjusted tax liability that should have been reported
for the IRS No. in column (b).
Column (f). If column (e) is greater than column (d), subtract column (d) from
column (e). This is an increase. If column (d) is greater than column (e),
subtract column (e) from column (d). This is a decrease. Show the decrease
in parentheses.

Line 2
Section 4051(d) tire credit. You must use line 2 to report any adjustment to
the section 4051(d) tire credit for a prior quarter. For example, if you report
an additional taxable vehicle on line 1 for IRS No. 33, the applicable tire
credit is reported on line 2. Enter CRN 366 in column 2(b). See the
Instructions for Form 720 for more information.
Section 6426 credits. You must use line 2 to report any adjustment to
section 6426 credits if (a) you’re reporting a change to certain taxable fuel
liability (section 4081 liability in the case of mixtures or section 4041 liability
in the case of alternative fuel) on line 1, or (b) you were unable to claim the
credits against the section 4041 or 4081 liability on a prior Form 720 because
you weren’t registered. Section 6426 credits include the biodiesel or
renewable diesel mixture credit, alternative fuel credit, and alternative fuel
mixture credit. Use a separate line for each adjustment. Enter the CRN from
the table below in column 2(b). You must also complete line 6.
Section 6426 credits for alternative fuel and mixtures of biodiesel,
renewable diesel, agri-biodiesel (allowed by section 6426 (c)(5)), or alternative
fuel have expired for sale, uses, or removals after 2024. You can’t claim
these credits for 2025 and later years. The section 6426 credit for SAF
expires after September 30, 2025, and is limited.
Credit

CRN

Credit Rate

Biodiesel (other than agri-biodiesel) mixtures

388

1.00

Agri-biodiesel mixtures

390

1.00

Renewable diesel mixtures

307

1.00

Sustainable aviation fuel mixtures*

440

1.25

Biodiesel or renewable diesel mixture credit

Alternative fuel credit and alternative fuel mixture credit
Liquefied petroleum gas (LPG)*

426

.50

“P Series” fuels

427

.50

Compressed natural gas (CNG)*

428

.50

Any liquid fuel derived from coal (including
peat) through the Fischer-Tropsch process

430

.50

Liquid fuel derived from biomass

431

.50

Liquefied natural gas (LNG)*

432

.50

Liquefied gas derived from biomass*

436

.50

Compressed gas derived from biomass*

437

.50

* The SAF credit is $1.25 for each gallon of SAF in a qualified mixture. To
qualify for the credit, the SAF must have a minimum reduction of 50% in
lifecycle greenhouse gas emissions. There is also a supplemental credit of
one cent for each percent that the reduction exceeds 50% up to $0.50.

Line 3a
Collectors using the alternative method for deposits must adjust their
separate accounts for any credits or refunds made to customers of the
collector. Form 720-X can’t be used for this purpose. For more information,
see Alternative method in the Instructions for Form 720.

Line 5
If you want your overpayment refunded to you, check the box for line 5a.
If you want your overpayment applied to your next Form 720, check the
box for line 5b and enter the quarter ending date of your next Form 720. You
can file Form 720-X separately or you can attach it to your next Form 720.
Caution: If you checked the box on line 5b, be sure to include the
overpayment amount on lines 6 and 7 on your next Form 720. See Form 720
for details. If you owe other federal tax, interest, or penalty, the overpayment
will first be applied to the unpaid amounts.

Line 6
You can use line 6 for your explanation or you can attach additional sheets
with your name and EIN as needed.
Adjustments on line 1. For each adjustment, you must include a detailed
description of the adjustment and the computation of the amount.

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Form 720-X (Rev. 10-2025)

Adjustments on line 2. Any section 6426 credits must first be applied
against your section 4041 or 4081 liability. To make an adjustment, you must
follow the instructions for lines 12, 13, and 14 in the Instructions for Form
720 (Rev. June 2025). For each adjustment, you must attach a detailed
explanation of the adjustment, including your registration number, and the
computation of the amount. Your computation must include the number of
gallons (or gasoline gallon equivalents) and credit rate (as shown above). You
must include any information that is requested in the Instructions for Form
720 (Rev. June 2025), for Form 720, lines 12, 13, and 14.
Section 6426 credits for alternative fuel and mixtures of biodiesel,
renewable diesel, agri-biodiesel (allowed by section 6426(c)(5)), or alternative
fuel, and alternative fuel mixtures have expired for sale, uses, or removals
after 2024. You can’t claim these credits for 2025 and later years. The
section 6426 credit for SAF expires after September 30, 2025, and is limited.
For example, the Certificate for Biodiesel and, if applicable, Statement of
Biodiesel Reseller must be attached to Form 720-X if it’s the first claim filed
that is supported by the certificate or statement. See the Instructions for
Form 720 (Rev. June 2025) for more information.
Certifications. On line 6 or a separate sheet of paper, you must include the
applicable statement shown below.
Biodiesel mixture credit. Claimant produced a mixture by mixing
biodiesel with diesel fuel. The biodiesel used to produce the mixture met
ASTM D6751 and met EPA’s registration requirements for fuels and fuel
additives. The mixture was sold by the claimant to any person for use as a
fuel or was used as a fuel by the claimant. Claimant has attached the
Certificate for Biodiesel and, if applicable, the Statement of Biodiesel
Reseller.
Renewable diesel mixture credit. Claimant produced a mixture by mixing
renewable diesel with liquid fuel (other than renewable diesel). The renewable
diesel used to produce the renewable diesel mixture was derived from
biomass, met EPA’s registration requirements for fuels and fuel additives,
and met ASTM D975, D396, or other equivalent standard approved by the
IRS. The mixture was sold by the claimant to any person for use as a fuel or

was used as a fuel by the claimant. Claimant has attached the Certificate for
Biodiesel and, if applicable, Statement of Biodiesel Reseller, both of which
have been edited as discussed in the Instructions for Form 720 (Rev. June
2025).
Alternative fuel mixture credit. Claimant produced a mixture by mixing
taxable fuel with alternative fuel. Claimant certifies that it (a) produced the
alternative fuel, or (b) has in its possession the name, address, and EIN of
the person(s) that sold the alternative fuel to the claimant; the date of
purchase; and an invoice or other documentation identifying the amount of
the alternative fuel. The claimant also certifies that it made no other claim for
the amount of the alternative fuel or has repaid the amount to the
government. The alternative fuel mixture was sold by the claimant to any
person for use as a fuel or was used as a fuel by the claimant.

Signature
Form 720-X must be signed by a person authorized by the entity to sign this
return. You must sign Form 720-X even if it’s filed with Form 720 to apply an
overpayment.

Paid Preparer Use Only
A paid preparer must sign Form 720-X and provide the information in the
“Paid Preparer Use Only” section at the end of the form if the preparer was
paid to prepare the form and isn’t an employee of the filing entity. Paid
preparers must sign paper forms with a manual signature. The preparer must
give you a copy of the form in addition to the copy to be filed with the IRS.
If you’re a paid preparer, enter your preparer tax identification number
(PTIN) in the space provided. Include your complete address. If you work for
a firm, you also must enter the firm’s name and the EIN of the firm. However,
you can’t use the PTIN of the tax preparation firm in place of your PTIN.
You can apply for a PTIN online or by filing Form W-12, IRS Paid Preparer
Tax Identification Number (PTIN) Application and Renewal. For more
information about applying for a PTIN online, visit the IRS website at
www.irs.gov/PTIN.