Free Printable W9 Form From Irs – Form W-9–Request for Taxpayer Identification Number and Certification–is a commonly used 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 end. Free Printable W9 Form From Irs