Information For...

For you and your family
Standard mileage and other information

Forms and Instructions

Individual Tax Return
Instructions for Form 1040
Request for Taxpayer Identification Number (TIN) and Certification
Request for Transcript of Tax Return

 

Employee's Withholding Allowance Certificate
Employer's Quarterly Federal Tax Return
Employers engaged in a trade or business who pay compensation
Installment Agreement Request

Popular For Tax Pros

Amend/Fix Return
Apply for Power of Attorney
Apply for an ITIN
Rules Governing Practice before IRS

If You Must Amend Your Return

If you need to make a change or adjustment on a return already filed, you can file an amended return. Use Form 1040X, Amended U.S. Individual Income Tax Return, and follow the instructions. Form 1040X cannot be filed electronically.

You should amend your return if you reported certain items incorrectly on the original return, such as filing status, dependents, total income, deductions or credits.

However, you don’t have to amend a return because of math errors you made; the IRS will correct those. You also usually won’t have to file an amended return because you forgot to include forms, such as W-2s or schedules, when you filed — the IRS will normally request those forms from you.