What is Form 1040X - Amended Tax Return?

If you made a mistake on your tax return or if you find that you did not report some taxable income on your tax return, you claimed tax deductions or tax credits you should not have claimed on your tax return, you failed to claim some tax deductions or tax credits you are entitled to on your tax return, or you should have used a different filing status on your tax return, you should file an amended tax return.

If you file an amended tax return shortly before the three (3) year statute of limitations expires and the amended tax return shows you owe additional tax the IRS has sixty (60) days from the date it receives the amended tax return to assess any additional tax - even if the statute of limitations has expired.

The tax form you use to correct a Form 1040, 1040A, or 1040EZ you already have filed is Form 1040X, Amended U.S. Individual Income Tax Return.

If you file an amended tax return and owe additional tax to the IRS, or you are assessed additional tax by the IRS, you may also owe additional state income tax. The IRS shares it's information with most states, and visa versa. You may be able to avoid interest and tax penalties on your state tax return by promptly amending the state tax return. The reverse is also true if your state tax liability increases.

Related tax information Form 1040X - Amended Tax Return

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IRS publications about Form 1040X - Amended Tax Return:
For additional information about Form 1040X - Amended Tax Return refer to Tax Topic 308, Amended Returns. For additional information on when, where, and how to file, refer to Tax Topic 301. Also see IRS Publication 17,

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