A Taxpayer Identification Number (TIN) is an identification number used by the Internal Revenue Service (IRS) in the administration of tax laws. It is issued either by the Social Security Administration (SSA) or by the IRS. A Social Security number (SSN) is issued by the SSA whereas all other TINs are issued by the IRS.
Taxpayer Identification Numbers:
- Social Security Number SSN
- Employer Identification Number EIN
- Individual Taxpayer Identification Number ITIN
- Taxpayer Identification Number for Pending U.S. Adoptions ATIN
- Preparer Taxpayer Identification Number PTIN