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This document is used for filing an amended individual income tax return with the Internal Revenue Service (IRS) to correct errors on a previously filed tax return.
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How to fill out form 1040x

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How to fill out Form 1040X

01
Obtain a copy of Form 1040X from the IRS website or your local IRS office.
02
Fill in your personal information at the top of the form, including your name, address, and Social Security number.
03
Indicate the year for which you are amending your tax return.
04
In Column A, enter the amounts from your original return.
05
In Column B, enter the corrected amounts that you are claiming.
06
In Column C, calculate the difference between Columns A and B.
07
Provide a detailed explanation of the changes you're making in Part III of the form.
08
Sign and date the form.
09
Mail the completed Form 1040X to the designated address for your state.

Who needs Form 1040X?

01
Anyone who has filed a federal income tax return and needs to correct an error or make changes.
02
Taxpayers who discover new information that might affect their tax liability after filing.
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You can file Form 1040-X, Amended U.S. Individual Income Tax Return electronically with tax filing software to amend your Form 1040, 1040-SR, 1040-NR, or 1040-SS/PR for the current or two prior tax periods. If amending a prior year return originally filed on paper, then the amended return must also be filed on paper.
If you owe additional tax, file your amended return, and pay the tax by the April due date to avoid penalties and interest. Your return will replace your original return. If you file after the April due date, don't include any interest or penalties on your amended return.
Is there a penalty for amending a return? No, not in most cases. But, if the reason you're amending your tax return is because you made a mistake that means you underpaid the IRS, you CAN owe the IRS money and could face other penalties and interest.
How long do you have to file an amended tax return? The IRS limits the amount of time you have to file an amended return to claim a refund to: within three years from the original filing deadline. within two years of paying the tax due for that year, if that date is later.
Download Form 1040-X from the IRS website.
When mailing your federal amended return, you will need to send the following: 1040-X. Income documents such as W-2's and 1099 forms if they support the changes on the return. Any forms that have a calculation change from the original return. Payments if you do not wish to pay electronically.
The fee for filing an amended tax return can vary significantly, but a general range is between $200 and $1,500. Here is a more detailed breakdown of these costs based on different factors.
There is no penalty for simply filing an amended return. But if your mistake caused you to underpay tax, you will owe that additional tax. If you amend your tax return before the April deadline and pay the remaining tax you owe, you won't have to pay a penalty.

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Form 1040X is an amended U.S. individual income tax return used to correct errors on a previously filed Form 1040, 1040A, or 1040EZ.
Any taxpayer who has made changes to their original tax return, such as corrections or updates, may be required to file Form 1040X.
To fill out Form 1040X, you need to provide your personal information, the tax year being amended, correct any errors in the original return, and explain the reasons for the amendment.
The purpose of Form 1040X is to allow taxpayers to make corrections to their previously filed tax returns, ensuring their tax information is accurate.
Form 1040X requires reporting of personal information, details of the originally reported amounts, changes being made, and an explanation of the amendments.
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