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Amended Tax Returns

Correcting a previously filed individual or business return — Form 1040-X, 1120-X, or an amended 1065/1120-S.

What we'll need

  • Copy of the originally filed return for the year being amended
  • Documentation supporting the correction
  • Any IRS or state notice related to the original filing, if applicable

Key due dates

Refund Claim Deadline
Generally 3 years from original filing (or 2 years from payment, if later)

Dates shown are general guidance and may shift for weekends/holidays or your specific situation.

Related guides

Amending a tax return: when to do it, how far back you can go, and what to expect →
An amended return corrects a return you’ve already filed. Whether you need one, and whether a refund is still available, depends on what changed and how much time has passed.

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