Amended Returns & Form 1040X
Question: What should I do if I made a mistake on my federal return that I have already filed? |
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Answer: It depends on the type of mistake that you made:
When filing an amended or corrected return:
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Include copies of any schedules that have been changed or any Form W-2 (PDF) you did not include.
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The Form 1040X (PDF) should be submitted after you receive your refund or by the due date of the return, whichever, is earlier.
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Generally, to claim a refund, the Form 1040X (PDF) must be received within three years after the date you filed your original return or within two years after the date you paid the tax, whichever is later.
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Page Last Reviewed or Updated: November 26, 2008