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menu link icon Formsmenu link icon Publicationsmenu link icon FAQs
Forms and Instructions Forms and Instructions
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Principal Publications Publications
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Related Publications
Publication 1635 Understanding Your Employer Identification Number (EIN)PDF version of this PublicationTopic Screen for this Publication
Publication 1915 Understanding Your IRS Individual Taxpayer Identification Number (ITIN)PDF version of this PublicationTopic Screen for this Publication
Publication 1915 (SP) Understanding Your IRS Individual Taxpayer Identification Number (ITIN) (Spanish Version)PDF version of this PublicationTopic Screen for this Publication
Links Inside Publications
Publication 334 - Tax Guide for Small Business (For Individuals Who Use Schedule C or C-EZ) - Filing and Paying Business Taxes
Publication 519 - U.S. Tax Guide for Aliens - Identification Number
Publication 583 - Starting a Business and Keeping Records - Identification Numbers
heading icon Frequently Asked Questions
FAQ - Small Business/Self-Employed/Other Business > Entities: Sole Proprietor, Partnership, Limited Liability Company/Partnership (LLC/LLP), Corporation, Subchapter S Corporation
FAQ - Small Business/Self-Employed/Other Business > Form SS-4 & Employer Identification Number (EIN)
FAQ - Small Business/Self-Employed/Other Business > Form SS-4 & Employer Identification Number (EIN)
FAQ - Small Business/Self-Employed/Other Business > Form SS-4 & Employer Identification Number (EIN)