• Taxpayer Identification Numbers are nine-digit tracking numbers used by the IRS for tax purposes.
  • The IRS issues all US taxpayer identification numbers. numbers other than social security numbers, which are issued by the Social Security Administration.
  • Tax filers must include their tax identification number on tax documents and when applying for benefits.
  • TIN is also required when applying for a loan and employment.
  • There are different types of taxpayer identification numbers such as employer identification number, individual taxpayer identification number and taxpayer identification number.