What It Is
An amended return corrects a return you already filed. You use it when you missed a deduction or credit, reported the wrong income, used the wrong filing status, or got a corrected W-2 or 1099 after filing. It can lower what you owe or get you a refund. You file Form 1040-X, and timing matters for refunds: you generally have three years from when you filed the original return or two years from when you paid the tax, whichever is later. Processing is slow, often several months.
Is This You?
- You found an error on a return you already filed
- A corrected W-2 or 1099 arrived after you filed
- You missed a deduction or credit and want the refund
What You Can Do
These are the steps that move this forward. Work through them in order.
- Pin down exactly what was wrong on the original return
- Gather the corrected documents
- Confirm you are within the refund time limit if you are owed money
- Complete Form 1040-X with original, corrected, and changed amounts
- Attach every form or schedule the change affects
- Keep a copy of the original return for reference
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Amended Returns Guide
Form 1040-X line by line, the refund deadline, and what to attach.
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