If you have a business, you may need to fill out IRS Form W-9 Fact checked by Suzanne Kvilhaug Form W-9 from the Internal Revenue Service (IRS), Taxpayer Identification Number and Certification ...

Form W-9 collects taxpayer ID for reporting income such as dividends and interest. W-9 income isn't initially withheld; payees must report and pay taxes themselves. Backup withholding at 28% ...