What Is Form W-9: Request for Taxpayer Identification Number (TIN) and Certification? Form W-9, Request for Taxpayer Identification Number (TIN) and Certification, is an Internal Revenue Service (IRS) ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Form W-9 is an IRS form used to give your taxpayer information to someone who must report ...

Foreign individuals use IRS Form W-8BEN to certify their non-U.S. status and claim benefits such as reduced withholding rates that may be available because of an income tax treaty. The form helps ...