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  1. Taxpayer identification numbers (TIN) | Internal Revenue Service

    A Taxpayer Identification Number (TIN) is an identification number used by the Internal Revenue Service (IRS) in the administration of tax laws. It is issued either by the Social Security …

  2. Tin - Wikipedia

    The word tin is shared among Germanic languages and can be traced back to reconstructed Proto-Germanic *tin-om; cognates include German Zinn, Swedish tenn and Dutch tin.

  3. EIN / TAX ID Number Lookup & Validation - HIPAASpace

    EIN verification service allows to find EIN (Employer Identification Number) is also known as a Federal Tax Identification Number) using organization name, address, or other entity attributes.

  4. Taxpayer Identification Number (TIN) Matching - Internal …

    Jul 3, 2025 · Apply to use the IRS Taxpayer Identification Number (TIN) Matching service. You can validate TIN and name combinations prior to submitting information returns.

  5. Taxpayer identification number (TIN) matching tools

    Aug 26, 2025 · The On-Line Taxpayer Identification Number (TIN) Matching Program is a free web-based tool offered by the IRS through e-Services and was established for payers of …

  6. TIN Definition & Meaning - Merriam-Webster

    The meaning of TIN is a soft faintly bluish-white lustrous low-melting crystalline metallic element with atomic number 50 that is malleable and ductile at ordinary temperatures and that is used …

  7. Taxpayer identification number (TIN): What it is and how to find it

    Jun 6, 2025 · What is a taxpayer identification number? A taxpayer identification number, or TIN, is a nine-digit tracking number assigned to a taxpayer. A Social Security number is one form of …

  8. Individual taxpayer identification number (ITIN) - Internal …

    Oct 28, 2025 · Check if you're eligible for these benefits as an ITIN applicant and how to claim them: Apply on or before your tax return due date. Include the tax return in your ITIN …

  9. Tin | Definition, Properties, Uses, & Facts | Britannica

    Nov 11, 2025 · Tin, a chemical element belonging to the carbon family, Group 14 (IVa) of the periodic table. It is a soft, silvery white metal with a bluish tinge, known to the ancients in …

  10. EIN vs. TIN: What’s the Difference Between These Tax Numbers?

    Mar 3, 2025 · What is a tax ID number (TIN)? A tax identification number (TIN) is more or less an umbrella term for various nine-digit numbers issued by the Internal Revenue Service (IRS) and …