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26 U.S. Code § 6109 / Form W-7 IRS Rules

ITIN Guide for Dependents

Step-by-step walkthrough of the IRS Form W-7 process to secure an Individual Taxpayer Identification Number (ITIN) for H-4, L-2, and F-2 visa dependents.

Process Timelines
7 Weeks (Standard; 9–11 Weeks Peak/Overseas)
3-Year Expiration (Federal-return non-use)

What is an ITIN and Who Needs It? (26 U.S. Code § 6109)

An Individual Taxpayer Identification Number (ITIN) is a nine-digit tax processing number issued by the IRS under Internal Revenue Code § 6109 for individuals who need a U.S. taxpayer identification number for federal tax purposes but do not have and are not eligible to obtain an SSN. Certain spouses and dependents of U.S. citizens, resident aliens, or nonresident alien visa holders may qualify when they meet the applicable Form W-7 requirements and have a qualifying federal tax purpose.

In visa communities, some spouses and dependents in H-4, L-2, F-2, or J-2 status may need an ITIN when they are not eligible for an SSN and have a qualifying federal tax purpose. Work authorization and SSN eligibility vary by immigration category, so an ITIN should not be described as necessary simply because someone is a dependent or does not currently work. For example, certain H-4 and L-2 spouses may qualify for employment authorization, and some J-2 spouses or dependents may obtain employment authorization.

The Golden Rule: You Must File a Tax Return

A common mistake is submitting Form W-7 without the required federal tax documentation. For most first-time applications and renewals, Form W-7 is attached to a completed U.S. federal income tax return, generally Form 1040 or Form 1040-NR. However, the IRS provides specific exceptions to the tax-return requirement, so applicants should use the applicable W-7 exception rules rather than assuming every ITIN application requires Form 1040.

How the Joint Application Works:
  • Prepare the Tax Return: Prepare the appropriate federal tax return, generally Form 1040 or Form 1040-NR. If a spouse or dependent is applying for an ITIN, leave that applicant's SSN field blank and attach the corresponding Form W-7. Whether the person is listed as a spouse or dependent and which tax benefit is being claimed depends on the applicable tax rules.
  • Complete Form W-7: Complete one Form W-7 for each applicant. Select the reason that actually applies. Current W-7 categories include reason d for a dependent of a U.S. citizen/resident alien, reason e for a spouse of a U.S. citizen/resident alien, and reason g for a dependent or spouse of a nonresident alien holding a U.S. visa. The correct reason depends on the applicant's relationship and tax situation.
  • Physical Assembly: The tax return must be signed as required for the filing status, and each ITIN applicant completes and signs their Form W-7 when required. Attach the W-7 application(s) and required supporting documentation to the front of the tax return and submit the package to the current IRS ITIN Operation address. The current 2026 U.S. Postal Service address is Internal Revenue Service, Austin Service Center, ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342.

ITIN Eligibility, Exceptions & Renewal

An ITIN is issued only when the applicant has a federal tax purpose and is not eligible for an SSN. Spouses and dependents generally must be claimed for an allowable tax benefit or file their own federal return. Common W-7 filing reasons include spouses or dependents of U.S. citizens or resident aliens and spouses or dependents of nonresident-alien visa holders.

A federal tax return is generally required with Form W-7, but specific exceptions can apply, including certain passive-income withholding, treaty, mortgage-interest, and FIRPTA situations. Do not assume an exception applies without matching the application to the current W-7 instructions.

An ITIN that is not used on a federal income tax return for three consecutive tax years expires after the third year of non-use. When the ITIN is expired and will again be used on a federal income tax return, the holder must renew it with Form W-7 and the applicable tax documentation.

The Three Methods to Verify Identity

To issue an ITIN, the IRS must verify the applicant's foreign status and identity. There are three official methods:

Method AMailing Original Documents

You can submit original supporting documents, including a passport, by mail to the IRS ITIN Operation. The IRS states that original documents are returned to the mailing address on Form W-7. If you need the documents within 60 days, consider using a designated TAC or CAA, or submit properly certified copies from the issuing agency when permitted.
NOTE: Original documents are valuable, so applicants should consider the document-verification options before mailing them.

Method BCertified Acceptance Agent (CAA) — Highly Recommended

An IRS Certifying Acceptance Agent (CAA) can complete and review Form W-7, authenticate specified supporting documents, complete Form W-7 (COA), and submit the application package to the IRS. CAAs are fee-based and fees vary by provider. For dependents, CAAs can authenticate passports and civil birth certificates; certain other dependent documents must still be sent to the IRS.
BENEFIT: A CAA can let you avoid mailing qualifying original documents yourself.

Method CIn-Person Appointment at an IRS TAC Office

Book an appointment at a designated IRS Taxpayer Assistance Center (TAC) that provides ITIN services. The TAC can authenticate most supporting documents and return authenticated documents at the appointment. TAC service is free, but appointments are required and availability varies by location.
BENEFIT: No IRS fee is charged for the document-authentication service.

Acceptable Identity Documents

The IRS currently lists 13 acceptable document types to establish identity and foreign status. The table below shows the principal role each document can play; additional dependent-residency rules can apply. A passport is generally the only stand-alone document, although certain dependents need additional U.S.-residency documentation when the passport lacks a U.S. date of entry:

Supporting DocumentProves IdentityProves Foreign Status
Passport (Stand-alone)✔️ Yes✔️ Yes
National Identification Card✔️ Yes✔️ Yes
Civil Birth Certificate✔️ Yes✔️ Yes*
Medical / School Records✔️ Yes✔️ Yes*
USCIS Photo Identification✔️ Yes✔️ Yes
U.S. Visa✔️ Yes✔️ Yes
U.S. State ID Card✔️ Yes❌ No
Foreign Voter Registration Card✔️ Yes✔️ Yes
U.S. Military ID✔️ Yes❌ No
Foreign Military ID✔️ Yes✔️ Yes
Foreign Driver's License✔️ Yes❌ No
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ITIN At-A-Glance
Primary FormIRS Form W-7
Generally Required AttachmentForm 1040/1040-NR, unless an exception applies
Processing CenterAustin, Texas
Best VerificationCertified Agent (CAA)

Frequently Asked Questions (FAQ)

An Individual Taxpayer Identification Number (ITIN) is a nine-digit tax processing number issued by the IRS under Internal Revenue Code § 6109 for individuals who need a U.S. taxpayer identification number for federal tax purposes but do not have and are not eligible to obtain an SSN. Certain spouses and dependents of U.S. citizens, resident aliens, or nonresident alien visa holders may qualify when they meet the applicable Form W-7 requirements and have a qualifying federal tax purpose.

Form W-7 is generally attached to the front of a completed U.S. federal income tax return, usually Form 1040 or Form 1040-NR. An ITIN applicant does not always need to attach a tax return when an applicable Form W-7 exception applies, such as certain third-party withholding or treaty-benefit situations.

No. You may mail the original passport or an appropriately certified copy from the issuing agency to the IRS, but you can avoid mailing the original by using an IRS Certifying Acceptance Agent (CAA) or a designated IRS Taxpayer Assistance Center (TAC) that provides ITIN document-authentication services. CAAs can authenticate passports and, for dependents, passports and civil birth certificates; other dependent documents may still have to be sent to the IRS.

An IRS Certified Acceptance Agent (CAA) is authorized to assist with Form W-7 and authenticate specified supporting documents. The CAA completes and attaches Form W-7 (COA), Certificate of Accuracy, to each Form W-7 application and returns authenticated documents according to the applicable IRS rules. For dependents, a CAA can authenticate passports and civil birth certificates, while certain other dependent documents must be sent to the IRS.

The IRS lists 13 acceptable supporting documents. A passport is the only stand-alone document that generally establishes both identity and foreign status, but a passport without a U.S. date of entry does not by itself satisfy certain dependent residency requirements. If a passport is not submitted, applicants generally must provide at least two acceptable document types that together establish identity and foreign status and satisfy the applicable photo requirement.

Yes. An ITIN expires if it is not used on at least one U.S. federal tax return for three consecutive tax years; it expires on December 31 after the third consecutive tax year of non-use. It must be renewed before being used again on a federal income tax return. An expired ITIN used only on information returns does not have to be renewed until it is needed for a federal income tax return.
Official IRS References

• IRS Form W-7 Application Details: irs.gov/form-w7
• IRS Revised Application Standards for ITINs: irs.gov/itin-standards