Please select the appropriate Taxpayer Identification Number (EIN, SSN, or ITIN) type and enter your 9-digit ID number. New line 3b has been added to this form.Use Form W9 to provide your correct Taxpayer Identification Number (TIN) to the person who is required to file an information return with the IRS. Foreign vendors do not complete the Substitute Form W-9; foreign persons or entities must submit one of five available forms. Form W9 is a commonly used IRS form for providing necessary information to a person or company that will be making payments to another person or company. 9 form is an Internal Revenue Service (IRS) tax form that is used to confirm a person's name, address, and taxpayer identification number (TIN) SCHOOLS FILLING OUT THE FORM: Most county school systems have already filled out NC Substitute W-9 forms available. The required document is the IRS W-9 form. The W-9 captures all the required tax information for tax reporting. La Foreign Account Tax Compliance Act (Ley de Cumplimiento.