tin

What Is a Taxpayer Identification Number (TIN)? A taxpayer identification number (TIN) is a unique nine-digit number used to identify an individual, business, or other entity in tax returns and other documents filed with the Internal Revenue Service (IRS). A TIN is typically either a Social...

What Is a Tax Identification Number (TIN)? A Tax Identification Number (TIN) is a nine-digit number used as a tracking number by the U.S. Internal Revenue Service (IRS) and is required information on all tax returns filed with the IRS. All U.S. tax identification numbers (TIN) or tax id numbers...