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Instructions for Form 1040-X›(Rev. December 2025)

Future Developments

Instruction 1040-X — Instructions for Form 1040-X, Amended U.S. Individual Income Tax Return · 2026-10-03 edition · updated 2026-10-04 · United States

For the latest information about developments related to Form 1040-X and its instructions, such as legislation enacted after they were published, go to IRS.gov/Form1040X .

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▸Contents — Instruction 1040-X — Instructions for Form 1040-X, Amended U.S. Individual Income Tax Return
Instruction 1040-X — Instructions for Form 1040-X, Amended U.S. Individual Income Tax Return

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