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 out.

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) ...

As a small-business owner, you may be thinking about outsourcing work to save time and expand your services. Before taking this step, make sure you ask contractors or companies to fill out a W-9 form.

An Internal Revenue Service Form W-9, Request for Taxpayer Identification Number, is an informational form that employers and prime contractors use to collect information they need to process their ...

Katharine Paljug is a financial writer and editor with over a decade of industry experience. Her writing has covered nearly every aspect of the financial world, from investing in forex to paying for ...