Where to Find Your US Taxpayer ID Number: SSN and EIN Explained

Learn how to locate your US taxpayer ID number for individuals and businesses, including SSN and EIN sources and IRS contact tips.

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Your US taxpayer ID number can be found on several documents, depending on the type of taxpayer you are. For individuals, it’s typically your Social Security Number (SSN), which can be found on your Social Security card. For businesses, it’s the Employer Identification Number (EIN), available on the notice from the IRS when you received it or on previous tax returns. If you’ve lost these documents, contacting the IRS directly or checking official IRS correspondence should help you retrieve your taxpayer ID number.

FAQs & Answers

  1. What is the difference between a Social Security Number and an Employer Identification Number? A Social Security Number (SSN) is a unique identifier assigned to individuals for tax and social security purposes, while an Employer Identification Number (EIN) is assigned to businesses for tax reporting.
  2. How can I get my taxpayer ID number if I lost it? If you lose your taxpayer ID number, you can find your SSN on your Social Security card or IRS documents, and for an EIN, check previous tax returns or IRS notices. You can also contact the IRS directly for assistance.
  3. Where can individuals find their Social Security Number? Individuals can find their Social Security Number on their Social Security card, tax returns, or official documents such as W-2 forms.

Watch More

For more insights on managing your tax information, explore our guides on how to apply for a new Social Security card, steps to request a duplicate EIN, and tips for protecting your personal data from identity theft.

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