Request for Taxpayer Identification Number and Certification is submitted on which form?

The Request for Taxpayer Identification Number and Certification is submitted using Form W-9. This form is utilized by individuals and businesses to provide their taxpayer identification number (TIN) to others who are required to report certain types of payments made to them. This certification is essential for ensuring that the correct TIN is used when preparing tax documents such as 1099 forms, which report income paid to independent contractors and other entities.

Form W-9 collects information such as the name, business name (if applicable), TIN, and certification of the individual or business providing the information. The form serves as both a request for the TIN and a certification that the TIN provided is correct, which is critical for compliance with IRS regulations in reporting income and withholding.

The other forms listed serve different purposes: Form SS-4 is used to apply for an Employer Identification Number (EIN); Form SS-8 is used to determine a worker's status as an independent contractor or employee; and Form W-7 is an application for an Individual Taxpayer Identification Number (ITIN). Each of these serves specific functions distinct from the collection of TINs for reporting income, which is the primary purpose of Form W-9.