ITINDesk

Self-service ITIN tool

Prepare your Form W-7 path with a free ITIN checklist.

ITINDesk helps you compare your situation with public IRS instructions, identify a likely W-7 reason, and build a printable checklist before you mail an ITIN application package.

Start W-7 Check Read Form W-7 Guide

What ITINDesk does

  • Explains Form W-7 in plain English.
  • Maps answers to public IRS W-7 reason categories.
  • Builds a printable ITIN checklist.
  • Links back to IRS source pages for verification.

Form W-7

Form W-7 is the IRS application for an Individual Taxpayer Identification Number.

Open the W-7 guide

ITIN vs EIN

An ITIN identifies an individual for federal tax purposes. An EIN identifies a business entity.

Compare ITIN and EIN

Certified Acceptance Agent

A CAA can review original documents for some ITIN applicants. Mailing documents directly is a separate path.

Learn about CAAs

Not sure which W-7 reason applies?

Use the free ITINDesk W-7 Reason Checker to compare your situation with public IRS instructions.

Start W-7 Check

Popular ITIN guides

W-7 Instructions

Turn the IRS instructions into a practical pre-mailing checklist.

Read W-7 instructions

Documents Required

Review identity, foreign status, passport, and certified copy rules.

Check ITIN documents

Primary IRS sources