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Identification Number
 Forms  Publications
Forms and Instructions Forms and Instructions
Relevant Forms
Form SS-4 Application for Employer Identification Number Topic Screen for this Form
SS-4 Instructions
Form W-7 Application for IRS Individual Taxpayer Identification Number Topic Screen for this Form
Form W-9 Request for Taxpayer Identification Number and Certification Topic Screen for this Form
W-9 Instructions for the Requestor of Form W-9
Principal Publications Publications
Related Publications
Publication 1635 Understanding Your Employer Identification Number (EIN) PDF version of this Publication Topic 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
Identification Numbers This section explains three types of taxpayer identification numbers, who needs them,...
Publication 583 - Starting a Business and Keeping Records - Identification Numbers
Identification Numbers You must have a taxpayer identification number so the IRS can process your returns....
Related Topic Links
right arrowFederal Employer Identification Number
right arrowIndividual taxpayer identification number
right arrowOther taxpayer identification number
right arrowPayee's Identification Number
right arrowTaxpayer identification numbers for adoptees