TIN number (Tax Identification Number) is a generic phrase that refers to any identification number used by the IRS to administer tax regulations. When submitting tax returns, claiming treaty benefits, or other tax-related paperwork, including statements, reports, and withholding certificates, you’ll need a TIN.
A tax identification number is a form of a social security number. Individuals and companies that report the yearly income of their employees to the IRS for their income tax return most typically utilize the tax identifying number.