HELP CENTER
ITIN Services Help Center
Practical documentation for non-U.S. residents applying for an ITIN with ITIN Services. Start with eligibility, prepare your documents, follow the service process, and know what to check after the IRS approves your number.
Document checklist
Prepare passport copies, tax return materials, and supporting details.
Service process
Understand review, preparation, signature, mailing, and IRS processing.
After approval
Verify your ITIN notice, fix errors, and keep the number ready for tax filing.
ITIN application reasons
Check whether an ITIN application fits your situation before you start.