Need help preparing your ITIN application? Start with ITIN Services.
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Understand the basic ITIN Services workflow before preparing your application.

This help center explains how ITIN Services helps non-U.S. residents apply for an Individual Taxpayer Identification Number, or ITIN, for U.S. tax filing or U.S.-source income reporting.

If you want to understand the process before paying, prepare application materials, or confirm what to do after the IRS approves your ITIN, start with these pages.

ITIN application reasons

Confirm why you need an ITIN and what information we need from you.

Document checklist

Prepare identity documents, tax materials, and mailing information before review.

Service process

See the customer workflow from intake to IRS processing.

After approval

Know what to check after receiving an ITIN notice.

What these documents are for

  • Explaining the standard ITIN application path.
  • Helping you prepare materials before review.
  • Reducing delays caused by missing or unclear information.
  • Giving customers a fixed place to handle post-approval questions.

These documents are general support information. Your exact application path may depend on your identity documents, tax reason, income type, and IRS requirements.