Individual Taxpayer Identification Number (ITIN)

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An ITIN is an identification number issued by the IRS to individuals who are not eligible to obtain a Social Security Number (SSN). This number serves as an identification number to file taxes and get a tax refund from income withheld by the IRS, but can also be used to open bank accounts and apply for loans.

An ITIN is not a substitute for an SSN and cannot be used to obtain a driver's license, work authorization, or Social Security benefits. You may not have both an ITIN and an SSN.

More information and locations of IRS Taxpayer Assistance Centers in Illinois that can authenticate copies of your Passport/identification documents can be found in our W-7 Brochure(pdf).You can also visit the IRS website to learn more and find other IRS Designated Offices in other states.

To apply for an ITIN, you need:

  • Completed Form W-7
  • Original tax return(s)
  • Original identification documents or certified copies from the issuing agency (for example, copies of your passport must be certified by your consulate or embassy) or at selected IRS Taxpayer Assistance Centers
  • Original passport
    Two unexpired documents supporting the identification information provided in the Form W-7, including at least one photo identification and an identification from your country of origin.