W9 Printable Form For 2021 IRS – W-9–Request to Taxpayer Identity Number and Certificate–is a typical IRS form. Customers may ask you to fill out and submit a W-9 form if you are a sole proprietor or independent contractor. They will use this info to prepare your 1099 NEC form accurately and report all payments at the finish. W9 Printable Form For 2021 IRS