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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 Administration (SSA) …

  2. Taxpayer Identification Number - Wikipedia

    A Taxpayer Identification Number (TIN) is an identifying number used for tax purposes in the United States and in other countries under the Common Reporting Standard.

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

    Jun 6, 2025 · A taxpayer identification number (TIN) is a nine-digit number used to identify taxpayers. If you need to file taxes, you need a TIN.

  4. What is a TIN Number - Guide 2026 | US Expat Tax Service

    Jan 7, 2025 · A Tax Identification Number (TIN) is a nine-digit number assigned to individuals, businesses, and other entities for identification in tax-related matters. Think of it as your personal “tax …

  5. What Is a Tax Identification Number (TIN)? - Investopedia

    May 10, 2025 · What Is a Tax Identification Number (TIN)? A Tax Identification Number (TIN) is a nine-digit number that the Internal Revenue Service (IRS) uses to identify taxpayers.

  6. How to Find Your Taxpayer Identification Number (TIN)

    Aug 10, 2025 · A Taxpayer Identification Number (TIN) is a nine-digit number used by the Internal Revenue Service (IRS). It identifies individuals and businesses for tax purposes and is required for …

  7. What is a tax ID number and how is it used? - MSN

    A tax identification number (TIN) is a unique nine-digit number issued to anyone who pays personal or business taxes.

  8. What is a TIN number? Here’s what to know | Stripe

    Nov 5, 2024 · A Taxpayer Identification Number (TIN) is a unique number used by the US Internal Revenue Service (IRS) to track individuals, businesses, and other entities for tax purposes.

  9. What Is a Taxpayer Identification Number (TIN)? - WorkBay

    Aug 11, 2025 · A Taxpayer Identification Number (TIN) is a unique number used by the Internal Revenue Service (IRS) to track tax obligations for individuals and businesses. It’s how the …

  10. taxpayer identification number (TIN) | Wex | US Law | LII / Legal ...

    A taxpayer identification number (TIN) is a unique nine-digit number assigned to a person or entity. The Internal Revenue Service (IRS) uses TINs for tax purposes to identify and track taxpayers.