Confirm the federal tax purpose
Identify why a U.S. taxpayer identification number is required and confirm the applicant is not eligible for an SSN.
HOW TO APPLY FOR AN ITIN
How to Apply for an ITIN: Step-by-Step Form W-7 Process
Start with the federal tax reason, complete Form W-7, gather the tax return or exception evidence and supporting documents, then choose mail, an IRS appointment or a CAA filing route.
Quick answer
How do you apply for an ITIN?
Complete Form W-7, attach the federal tax return unless you qualify for an IRS exception, and provide supporting documents that prove identity and foreign status. You can submit by mail or apply in person through an eligible IRS Taxpayer Assistance Center, VITA site with ITIN services, Certifying Acceptance Agent or Acceptance Agent.
ITIN application process
Choose the Form W-7 reason
The reason selected on Form W-7 should match the applicant’s tax situation and the documents being submitted.
Complete Form W-7
Enter the applicant’s identifying information carefully and keep names, birth details and foreign address information consistent.
Attach the tax return or exception evidence
Most first-time applications include a federal tax return. If an IRS exception applies, attach the documentation required for that exception.
Gather supporting documents
Prepare current originals or issuing-agency certified copies that meet the identity, foreign-status and any dependent residency requirements.
Choose the submission route
Mail the package to the IRS or apply in person using a participating IRS office, VITA site, CAA or Acceptance Agent.
Track notices and respond
Watch for IRS mail and respond promptly if additional information or documents are requested.
Compare the main filing routes
There is no single best route for every applicant. The choice depends on location, document availability, appointment access and whether you want to mail original identity documents.
Mail to the IRS
Mail Form W-7, the tax return or exception evidence and required supporting documents to the IRS ITIN operation in Austin.
IRS in-person route
Participating Taxpayer Assistance Centers can review Form W-7 and authenticate most supporting documents by appointment.
CAA or Acceptance Agent
Agents approved by the IRS can help with Form W-7 and submission. A CAA has additional authority to authenticate most eligible supporting documents.
After submission
What happens after you apply?
The IRS currently advises applicants to allow about 7 weeks for an ITIN application status notice, or 9–11 weeks during January 15–April 30 or when applying from overseas.
CP565
The IRS assigned an ITIN. Keep the notice with your tax records.
CP566
The IRS needs more information to process the application. Follow the notice carefully and respond with the requested material.
CP567
The ITIN application was rejected. Review the reason before preparing a corrected or new submission.
Send a short case summary and we can identify which part of the ITIN process needs attention first.
Email your case