Got a Mistake on Your Tax Returns? (File an Amendment, Form 1040-X)

If you need to make a change or adjustment on a return already filed, you can file an amended return (Use Form 1040-X).

You should file an Amendment, Form 1040-X, with the Internal Revenue Service (IRS) if you need to correct information on a previously filed tax return. Here are some common reasons why you might need to file an amendment:

  1. Correcting Errors: If you made a mistake on your original tax return, such as misreporting income, claiming incorrect deductions, or failing to report certain credits, you should file an amendment to correct these errors.
  2. Updating Information: If you receive additional tax documents after you’ve already filed your return (like a corrected W-2 or 1099), you may need to file an amendment to include this new information.
  3. Changing Filing Status: If you initially filed with the wrong filing status (single, married filing jointly, etc.), you might need to amend your return to correct this.
  4. Claiming Missed Deductions or Credits: If you realized you missed out on claiming certain deductions or tax credits that you were eligible for, filing an amendment can help you get the additional refund you’re entitled to.
  5. Reporting Income Not Previously Included: If you received income that you didn’t report on your original return, such as income from a forgotten source or a corrected 1099, you should amend your return to include it.
  6. Addressing IRS Discrepancies: If the IRS contacts you with discrepancies or errors in your original return, you may need to file an amendment to address these issues.
  7. Carryback of Losses or Credits: If you have carryback losses or credits from a subsequent year that affect a prior year’s return, you might need to amend the prior year’s return to reflect these changes.

Make sure to attach any necessary supporting documentation, such as updated tax forms or schedules. Keep in mind that there is a limited window of time within which you can file an amendment. Generally, you have up to three years from the original filing deadline (including extensions) to file an amendment and claim a refund. However, if you’re amending to claim an additional refund, it’s best to file as soon as you discover the error.

Filing an amendment can be a bit more complex than filing an original return, so you might consider seeking assistance from a tax professional or using tax software to ensure accuracy.

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