

A growing share of taxpayers seeking an Individual Taxpayer Identification Number are avoiding mail-in packets during the busiest part of tax season. Guidance from the Internal Revenue Service and oversight analysis suggest that more applicants are using in-person verification at IRS Taxpayer Assistance Centers or Certified Acceptance Agents rather than mailing original documents with Form W-7.
Oversight reports indicate that paper ITIN applications remain the primary method for requesting a Taxpayer Identification Number when a taxpayer cannot obtain a Social Security number. Yet submission patterns are shifting during the peak tax season from mid-January through April.
The Individual Taxpayer Identification Number allows individuals to meet federal income tax obligations when they are not eligible for an SSN. Many applicants are nonresident aliens, resident aliens, or international students who must file a federal income tax return, such as Form 1040 or Form 1040-NR. The number is used strictly for federal tax purposes and does not change immigration status.
Because the Internal Revenue Service still requires a paper file submission for the application for a Taxpayer Identification Number using Form W-7, the filing rush can slow the application process at the ITIN Operation Service Center in Austin, TX.
Oversight analysis shows that how taxpayers submit Form W-7 can affect approval outcomes. Applications mailed with original documents such as passports, national ID card records, or a civil birth certificate historically face higher rejection rates.
Applications submitted through IRS Taxpayer Assistance Centers or Certified Acceptance Agents tend to have fewer errors because agents review official documents, confirm foreign status, and check Form W-7 completion against the Instructions for Form W-7.
For taxpayers who must file quickly to claim tax credits, meeting a filing requirement or submitting a federal income tax return on time is important during tax season.
The Individual Tax Identification Number is used by the Internal Revenue Service for tax administration when individuals must report income from U.S. sources or meet federal income tax obligations but cannot obtain an SSN.
Applicants submit Form W-7 with a federal income tax return unless an exception listed in the Form W-7 Instructions applies. Some taxpayers use the number to claim tax credits, such as the Child Tax Credit, the Credit for Other Dependents, or the Premium Tax Credit, or to complete forms like Schedule 8812, Form 8863, or a Statement of Person Claiming Refund on Form 1310.
Document requirements often determine how applicants file their applications. The Internal Revenue Service usually requires original documents or certified copies issued by the agency that created them. Acceptable documents may include a passport, national ID card, civil birth certificate, school record, medical record, or other official documents proving identity and foreign status.
Mailing these records can make applicants cautious, particularly when passports or other notarized documents are involved.
Certified Acceptance Agents assist with Form W-7 completion by reviewing supporting documents and confirming document authentication before submission. These representatives help taxpayers avoid mailing original documents to the ITIN Operation in Austin, TX.
Taxpayers may also visit IRS Taxpayer Assistance Centers for document review. In those cases, staff verify passport information and other official documents and return them immediately rather than requiring the taxpayer to mail them.
Under normal conditions, ITIN applications take about seven weeks to process. During the peak tax season, from January 15 to April 30, processing may take 9 to 11 weeks, especially if additional verification is required.
Preparing documents carefully before submission can help taxpayers meet their filing requirements and complete a U.S. tax return without delays.
By William Mc Lee, Editor-in-Chief & Tax Expert—Get Tax Relief Now