W9 Form 2021 Irs – Form W-9–Request for Taxpayer Identification Number and Certification–is a generally used IRS form. When you work for a client, or if your company is independent, they may ask that you fill out and return a W-9 to ensure they can prepare the 1099-NEC form accurately and after that report the payments you receive at the close of the year. W9 Form 2021 Irs