Taxpayer Identification Number (TIN) Law and Legal Definition

Taxpayer Identification Number (TIN) means “the number required by the IRS to be used by the offeror in reporting income tax and other returns. The TIN may be either a Social Security Number or an Employer Identification Number.” [48 CFR 2.101; Title 48-Federal Acquisition Regulations System; Chapter 1-Federal Acquisition Regulation; Subchapter A-General; Part 2-Definitions Of Words And Terms; Subpart 2.1-Definitions]