Internal Revenue Service United States Department of the Treasury
Level Basic Intermediate Advanced Military International

Filing Basics

Verifying Taxpayer Identity

No Valid SSN or ITIN

Who needs an ITIN?

Taxpayers must apply for an ITIN if they:

  • Must file a U.S tax return or are listed on a tax return as a spouse or dependent and
  • Do not have and cannot obtain a valid SSN

IRS regulations require that each person listed on a U.S. federal income tax return have a valid TIN. The ITIN is entered on the return wherever the social security number is requested.

Portion of Form 1040 with social security number filled in