Form 1040-XIndividual Income Tax
Amended U.S. Individual Income Tax Return
Used to amend a previously filed return to correct errors, claim missed deductions, or report additional income.
Who Files This Form
Taxpayers who need to correct a previously filed Form 1040
Due Date
Within 3 years of filing the original return, or within 2 years of paying the tax, whichever is later
Important Notes
Processing takes 16-20 weeks (longer than usual since 2020). Track status with 'Where's My Amended Return' tool on irs.gov.
Related Forms
Official IRS Source
Always download the current version and instructions from the IRS website before filing.
Educational Reference Only: This is general information about Form 1040-X, not tax advice. Form instructions change annually. Always download the current version from irs.gov and read the official instructions. Consult a qualified tax professional for your specific situation. Read full disclaimer →