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2025 IRS Form 1040-X & Instructions

About Form 1040-X

Users: Individual Taxpayers
Filing Deadline: Within 3 years of original return
Purpose: Amend tax return
Applicable Income Types: All income types

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Tips For Using Form 1040-X

1. Completing Form 1040-X
Use Form 1040-X to amend a previously filed tax return. Clearly indicate changes and provide explanations for amendments.
2. Understanding Amendments
Determine if you need to file Form 1040-X for corrections to income, deductions, or credits. Amendments can result in additional refunds or taxes owed.
3. Submitting Your Form
Sign and date Form 1040-X. Mail it to the IRS, as e-filing is not available for amended returns. Allow up to 16 weeks for processing.