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The Global Insight

How do I know if I need to amend my tax return?

Author

Sarah Garza

Updated on March 13, 2026

You can amend your tax return if: There is a change in filing status, income, dependents, credits, or deductions. You are expecting a tax credit or refund. You have to amend within 3 years, after the date you filed your original tax return or within 2 years after the date you paid the tax whichever is later.

What happens when you amend your taxes?

Amended returns take up to 16 weeks to process. You will receive any additional refund you are owed. Amending to pay additional tax. If you’re filing an amended tax return because you owe more tax, you should file Form 1040X and pay the tax as soon as possible.

What should I include in my tax amendment?

Answer:

  1. File an amended return using Form 1040-X, Amended U.S. Individual Income Tax Return as soon as possible.
  2. Include any forms and/or schedules that you’re changing and/or didn’t include with the original return.
  3. Return the refund check with your amended return along with a letter of explanation.

Can I refile my taxes if I made a mistake?

If you want to make changes after the original tax return has been filed, you must file an amended tax return using a special form called the 1040X, entering the corrected information and explaining why you are changing what was reported on your original return. You don’t have to redo your entire return, either.

How much does it cost to amend your taxes?

There’s no charge to file an amended return (1040X). You’ll have to file it on paper (print, sign, and mail) since IRS won’t accept e-filed amended returns.

What happens if you don’t amend your tax return?

Interest is charged on any tax not paid by the due date of the original return, without regard to extensions. The IRS will compute the interest and send you a bill if you don’t include it. If the IRS thinks you owe penalties it will send you a notice, which you can either pay or contest.

How do I file an amended tax return for 2020?

You can now file Form 1040-X electronically with tax filing software to amend 2019 or 2020 Forms 1040 and 1040-SR. To do so, you must have e-filed your original 2019 or 2020 return.

What kind of tax return is an amended return?

A Form 1040, U.S. Individual Income Tax Return marked as an amended or corrected return (not a Form 1040-X, Amended U.S. Individual Income Tax Return) An amended return with a foreign address A business tax amended return

When to amend EIS income tax relief carry back?

I have been advised that although one has almost six tax years to claim EIS income tax relief, any adjustment of a previous EIS carry back claim has to be done within 4 tax years after the tax year to which the relief is carried back.

Can you file an amended tax return for 2020?

Only Tax Year 2019 and 2020 1040 and 1040-SR returns can be amended electronically at this time. Amended Returns for any other tax years or tax types must be filed by paper. There must be a record of an “original” electronically filed return for Tax Year 2019 or Tax Year 2020.

How long does it take to process an amended tax return?

How long will it take to process an amended return? A Form 1040-X, Amended U.S. Individual Income Tax Return can take up to 16 weeks to process once we receive it. Will calling the IRS help me get my amended return processed any faster?