Fill Out Form 1040-X Online Correct a return you already filed

Amend your Form 1040, 1040-SR, or 1040-NR on paper: enter the original amounts, the changes, and the corrected figures, and the official IRS form fills in line by line as you go.

View the form on IRS.gov

How to fill it out: Instructions for Form 1040-X

Return you’re amending

Use a separate Form 1040-X for each year you’re correcting.

Calendar year (optional)

The tax year of the return you’re amending.

Or fiscal year ended (optional)

Only for a fiscal-year return: month and year it ended.

For a paper Form 1040-X you also attach a completed, updated Form 1040, 1040-SR, or 1040-NR for that year with your changes. You can prepare a 2025 one with the Form 1040 generator.

Filing status

Check one box even if your filing status isn’t changing. In general you can’t change from married filing jointly to separate returns after the due date.

Amended return filing status *

Single Married filing jointly Married filing separately (MFS) Head of household (HOH) Qualifying surviving spouse (QSS)

Spouse’s name *

I’m amending a Form 1040-NR Then the spouse’s name isn’t needed.

Child’s name (optional)

Only if the person who qualifies you for this status is a child who isn’t your dependent.

Name, SSN, and current address

On an amended joint return, list both names and SSNs in the same order as on the original return. If you’ve moved, use your current address.

First name and middle initial *

Last name *

Your Social Security number *

Or your ITIN.

Spouse

Spouse’s first name and middle initial *

Spouse’s last name *

Spouse’s Social Security number *

Or their ITIN.

Current address

Street address or P.O. box *

Apt. no. (optional)

City, town, or post office *

State *

ZIP code *

I have a foreign address Enter the city above, leave State and ZIP empty, and fill in the country below.

Foreign country name *

Province, state, or county (optional)

Foreign postal code (optional)

Presidential Election Campaign

I didn’t want $3 to go to the fund before, but now I do Checking a box won’t change your tax or refund.

My spouse didn’t before, but now does

Income and deductions

Copy the amounts for the year you’re amending. The generator doesn’t add or subtract anything.

A: the amount on your original return, or as the IRS or an earlier amended return adjusted it. B: the net increase or (decrease); type a minus sign for a decrease. C: the correct amount. Fill in only the lines you’re changing, as the instructions’ charts show.

1 · Adjusted gross income

A · Original

B · Change

C · Correct

Line 1: a net operating loss (NOL) carryback is included

2 · Itemized deductions or standard deduction

A · Original

B · Change

C · Correct

3 · Line 1 minus line 2

A · Original

B · Change

C · Correct

4a · Qualified business income deduction

A · Original

B · Change

C · Correct

4b · Deductions for tips, overtime, car loan interest, and seniors (Schedule 1-A)

A · Original

B · Change

C · Correct

5 · Taxable income (line 3 minus lines 4a and 4b)

A · Original

B · Change

C · Correct

Tax liability

6 · Method(s) used to figure the tax (optional)

For example Tax Table, Tax Computation Worksheet, or Qualified Dividends and Capital Gain Tax Worksheet. See the instructions.

6 · Tax

A · Original

B · Change

C · Correct

7 · Nonrefundable credits

A · Original

B · Change

C · Correct

Line 7: a general business credit carryback is included

8 · Line 6 minus line 7 (if zero or less, 0)

A · Original

B · Change

C · Correct

10 · Other taxes

A · Original

B · Change

C · Correct

11 · Total tax (lines 8 and 10)

A · Original

B · Change

C · Correct

Payments

12 · Federal income tax withheld and excess Social Security and tier 1 RRTA tax withheld

A · Original

B · Change

C · Correct

13 · Estimated tax payments, including any amount applied from the prior year

A · Original

B · Change

C · Correct

14 · Earned income credit (EIC)

A · Original

B · Change

C · Correct

15 · Refundable credits

A · Original

B · Change

C · Correct

Line 15: where the refundable credits come from Optional

Schedule 8812

Form 2439

Form 4136

Form 8863

Form 8885

Form 8962

Other

Other (specify) (optional)

16 · Paid with an extension request, with the original return, and after it was filed

Column C only, like the rest of lines 16 to 23.

17 · Total payments (lines 12 to 15, column C, and line 16)

Refund or amount you owe

18 · Overpayment shown on the original return or as adjusted by the IRS

19 · Line 17 minus line 18

If line 18 is larger, this is negative: type a minus sign.

20 · Amount you owe

See IRS.gov/Payments for ways to pay.

21 · Amount overpaid on this return

22 · Amount of line 21 refunded to you

23 · Applied to estimated tax for year (optional)

23 · Amount applied

Part I: Dependents

Are you changing any information about your dependents? *

Yes No

Including the number of dependents you claim.

25 · Your dependent children who lived with you more than half of the year

A · Original

B · Change

C · Correct

27 · Other dependents

A · Original

B · Change

C · Correct

30 · How many dependents are you claiming on this amended return? *

List all of them: the ones from your original return you’re still claiming and any you’re adding.

Fill in four here and list the others on an attached statement. We’ll check the box for more than four dependents.

Dependent 1

(1) First name *

(2) Last name *

(3) SSN *

(4) Relationship to you *

(5a) Lived with you for more than half of the return year

(5b) ...and that home was in the U.S.

(6) Full-time student

(6) Permanently and totally disabled

(7) Credit for this dependent (optional)

Child tax credit Credit for other dependents Neither

Dependent 2

(1) First name *

(2) Last name *

(3) SSN *

(4) Relationship to you *

(5a) Lived with you for more than half of the return year

(5b) ...and that home was in the U.S.

(6) Full-time student

(6) Permanently and totally disabled

(7) Credit for this dependent (optional)

Child tax credit Credit for other dependents Neither

Dependent 3

(1) First name *

(2) Last name *

(3) SSN *

(4) Relationship to you *

(5a) Lived with you for more than half of the return year

(5b) ...and that home was in the U.S.

(6) Full-time student

(6) Permanently and totally disabled

(7) Credit for this dependent (optional)

Child tax credit Credit for other dependents Neither

Dependent 4

(1) First name *

(2) Last name *

(3) SSN *

(4) Relationship to you *

(5a) Lived with you for more than half of the return year

(5b) ...and that home was in the U.S.

(6) Full-time student

(6) Permanently and totally disabled

(7) Credit for this dependent (optional)

Child tax credit Credit for other dependents Neither

You lived apart from your spouse for the last 6 months of the return year, or you’re legally separated Under a written separation agreement or a decree of separate maintenance, and you didn’t live in the same household at the end of the year.

Part II: Explanation of changes

Tell the IRS why you’re filing Form 1040-X and explain each change in column B. This part is required.

Explanation *

About 16 lines fit on the form; we wrap the text for you. If you need more room, attach a statement and say so here.

Sign here

The IRS doesn’t accept digital, electronic, or typed signatures on a Form 1040-X filed on paper, so the signature lines stay empty for you to sign in ink. On an amended joint return, both spouses sign.

I’ll attach a completed, updated Form 1040, 1040-SR, or 1040-NR with my changes Required for paper-filed Forms 1040-X. Write Amended across its top and attach it behind the 1040-X, with any new or changed forms and schedules.

I’ll sign the printed form by hand (and so will my spouse, on a joint return)

Date (optional)

Leave empty to write the date when you sign.

Your occupation (optional)

Identity Protection PIN (optional)

Only if the IRS sent you one. Use the IP PIN for the year you’re filing in.

Spouse

Spouse’s date (optional)

Spouse’s occupation (optional)

Spouse’s Identity Protection PIN (optional)

Phone no. (optional)

Email address (optional)

Paid preparer use only If someone you paid prepared it

The preparer signs and dates their own section by hand.

Preparer’s name (optional)

PTIN (optional)

Preparer is self-employed

Firm’s name (optional)

Firm’s address (optional)

Firm’s phone no. (optional)

Firm’s EIN (optional)

Your SSNs stay on this device. The PDF is created in your browser, and nothing you type is uploaded or saved.

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Complete the required fields to download or print your Form 1040-X.

Still needed:

Downloaded. Sign and date it in ink (both spouses on a joint return), attach your completed, updated Form 1040, 1040-SR, or 1040-NR and any new or changed forms and schedules, and mail it to the address for your state in the Where To File chart. Track it with Where’s My Amended Return?

Page

View the form on IRS.gov

How to fill it out: Instructions for Form 1040-X

Disclaimer: forms.app offers this Form 1040-X generator and the IRS form it fills free of charge, as a convenience. forms.app is not affiliated with the Internal Revenue Service, doesn’t file amended returns for you, doesn’t figure your tax or check your numbers, and doesn’t give tax, legal, or accounting advice. You are responsible for the amounts you enter, for attaching your updated return and supporting documents, and for filing on time. Form 1040-X and its instructions are published by the IRS at irs.gov/Form1040X. If you’re not sure how a change affects your tax, talk to a tax professional. Found something on this page that’s wrong or out of date? Let us know.

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Who uses Form 1040-X?

Form 1040-X, Amended U.S. Individual Income Tax Return, is how you correct a Form 1040, 1040-SR, or 1040-NR you already filed: income you left out, a deduction or credit you missed or shouldn’t have claimed, a different filing status, or a change to your dependents.

Use a separate Form 1040-X for each year you’re amending, and file it only after the original return. To claim a refund, file within 3 years after you filed the original return, or within 2 years after you paid the tax, whichever is later. Don’t use it for a refund of penalties and interest only (that’s Form 843) or for an injured spouse claim (Form 8379). You can also amend electronically with tax software.

How the 1040-X generator works

Pick the year you’re amending and your filing status, then enter your name, SSN, and current address. For each line you’re changing, type the original amount in column A, the increase or decrease in column B (a minus sign for a decrease, printed in parentheses), and the correct amount in column C. The generator copies your figures; it doesn’t do the math. Then update your dependents if needed and explain every change in Part II.

Both pages of the official form fill in as you type. A paper Form 1040-X has to be signed by hand, so print it, sign it in ink, and attach a completed, updated Form 1040, 1040-SR, or 1040-NR with your changes, as the IRS now requires. Need another form? Browse all tax form generators.

Good to know about Form 1040-X

When should I file Form 1040-X?

After you’ve filed your original return and found something to correct: income, deductions, credits, filing status, or dependents. To get a refund, it generally has to be filed within 3 years after the date you filed the original return (an early return counts as filed on the due date) or within 2 years after you paid the tax, whichever is later.

Do I need to attach anything?

Yes. For a paper Form 1040-X, the IRS now requires a completed, updated Form 1040, 1040-SR, or 1040-NR with your changes for that year, plus any new or changed forms and schedules. Attach a new or corrected Form W-2 or 1099 if it changed your income or withholding.

What goes in columns A, B, and C?

Column A is the amount from your original return, or as the IRS or an earlier amended return adjusted it. Column B is the net increase or decrease, and Column C is the correct amount. Type a decrease with a minus sign; it prints in parentheses. Explain every change in column B in Part II.

Where do I mail Form 1040-X?

To the IRS address for the state you live in now, listed in the Where To File chart in the instructions. If you’re filing it because of an IRS notice, use the address in the notice, and a 1040-X amending Form 1040-NR goes to Austin, Texas. You can also amend electronically with tax software.

Can I sign Form 1040-X on screen?

Not on a paper return. The instructions say a paper Form 1040-X must carry a handwritten signature, and digital, electronic, or typed signatures aren’t valid on it. So the generator leaves the signature lines empty for you, and your spouse on a joint return, to sign in ink.

How long does an amended return take?

Generally 8 to 12 weeks, and up to 16 weeks in some cases. It can take up to 3 weeks after you mail it to appear in Where’s My Amended Return on IRS.gov, where you can follow its status with your SSN, date of birth, and ZIP code.

Can I amend more than one year?

Yes, but each year needs its own Form 1040-X, and each one gets its own updated return attached. You can also file more than one Form 1040-X for the same year, as long as each is filed on time.

Is my information private?

Yes. Everything you type, including SSNs, stays in your browser. The PDF is created on your device, and nothing is uploaded to or saved by forms.app, so download it before you close the page.

Is this 1040-X generator free?

Yes. Fill out, download, and print as many Forms 1040-X as you need, with no fee and no account.

Your Form 1040-X isn’t ready to print yet

Fill in the required fields on the page (the year, filing status, your name, SSN, and address, the dependents question, the explanation of changes, and the two boxes in Sign here), then print again.

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