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  1. Limited liability company (LLC) - Internal Revenue Service

  2. Single member limited liability companies - Internal Revenue Service

  3. Employer identification number | Internal Revenue Service

  4. How to Apply for an EIN | Internal Revenue Service

  5. Get an employer identification number - Internal Revenue Service

  6. Help - EIN Assistant - Internal Revenue Service

  7. Instructions for Form SS-4 (12/2023) - Internal Revenue Service

  8. LLC filing as a corporation or partnership - Internal Revenue Service

  9. Starting a business - Internal Revenue Service

  10. Do you need an EIN? | Internal Revenue Service