Form W-9 is a simple IRS tax form, but mistakes can cause delays and withholding. Learn when you need it and how to fill it ...

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) ...

A W-9 is an IRS form that independent contractors fill out to give businesses their tax ID number and personal information. Many, or all, of the products featured on this page are from our advertising ...

IRS forms W-8 and W-9 serve distinct purposes in the tax system and are used by different groups to fulfill their tax obligations. A W-8 form is typically required ...

The IRS continues to roll out drafts of some 2026 tax forms, including a draft of Form W-9, Request for Taxpayer Identification Number and Certification. Here’s a look at what’s new—and why it matters ...