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Instructions for Form 943-X›(Rev. February 2026)›General Instructions: Understanding Form 943-X

Overview of the Process

Instruction 943-X — Instructions for Form 943-X, Adjusted Employer's Annual Federal Tax Return for Agricultural Employees or Claim for Refund · 2026-10-03 edition · updated 2026-10-04 · United States

To correct a previously filed Form 943, use Form 943-X to file either an adjusted employment tax return or a claim for refund or abatement. The adjustment process and the claim process are outlined below.

If you underreported the tax. If you underreported the tax on a previously filed Form 943, check the box on line 1 and pay any additional amount you owe by the time you file Form 943-X. For details on how to make a payment, see the instructions for line 25, later.

Example—You underreported employment taxes. On June 18, 2026, you discovered an error that results in additional tax on your 2025 Form 943. File Form 943-X by February 1, 2027 (January 31, 2027, is a Sunday), and pay the amount you owe by the time you file. See When Should You File Form 943-X , earlier. Don’t attach Form 943-X to your 2026 Form 943. If you overreported the tax. If you overreported the tax on a previously filed Form 943, choose one of the following options.

  • Use the adjustment process. Check the box on line 1 to apply any credit (negative amount) from line 25 to Form 943 for the year during which you file Form 943-X.

  • Use the claim process. Check the box on line 2 to file a claim on Form 943-X requesting a refund or abatement of the amount shown on line 25.

To ensure that the IRS has enough time to process a credit for an overreporting tax adjustment in the year during which you file Form 943-X, you’re encouraged to file Form 943-X correcting the overreported tax amount in the first 11 months of a year. For example, if you discover an overreported tax amount in December, you may want to file Form 943-X during the first 11 months of the next year. However, there must be 90 days remaining on the period of limitations when you file Form 943-X. See the Caution under Is There a Deadline for Filing Form 943-X, earlier. This should ensure that the IRS will have enough time to process Form 943-X so the credit will be posted before you file Form 943, thus avoiding an erroneous balance due notice from the IRS. See the example next.

Example—You want your overreported tax applied as a credit on Form 943. On December 19, 2025, you discover you overreported your tax on your 2024 Form 943 and want to choose the adjustment process. To allow

the IRS enough time to process the credit, you file Form 943-X on January 2, 2026, and take the credit on your 2026 Form 943.

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▸Contents — Instruction 943-X — Instructions for Form 943-X, Adjusted Employer's Annual Federal Tax Return for Agricultural Employees or Claim for Refund
Instruction 943-X — Instructions for Form 943-X, Adjusted Employer's Annual Federal Tax Return for Agricultural Employees or Claim for Refund

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