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Can you amend a prior-year tax return?

Short answer

Yes, you can amend a prior-year tax return to fix mistakes or claim missed deductions. Individuals use Form 1040-X, and businesses use their own amended return forms. Refund claims generally must be filed within three years of the original return or two years of paying the tax, whichever is later.

Answered by Dushyant Hirwani · Updated November 3, 2026
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