TIN

TIN (plural TINs)

2. (various countries) Initialism of taxpayer identification number.

   Hypernyms: number, identifier

   Hyponyms: ITIN (“individual taxpayer identification number”) (US); SSN (“social security number”) (US); EIN (“employer identification number”) (US); ATIN (“adoption taxpayer identification number”) (US); SIN (“social insurance number”) (Canada); national insurance number (UK)

   Coordinate terms: (often coinstantial) national identification number, national identity number

   • 2025 May, “The One, Big, Beautiful Bill”, in United States House Committee on Ways & Means‎^[1], page 43:

     The AOTC and/or LLC cannot be claimed if the TIN is issued after the due date of the return (including extensions).

• INT, ITN, i'n't, in't, int, int., nit