W 9 Tax Forms Printable – The IRS forms W-9, Request for Taxpayer Identification Number (and Certification) are all generally used. 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. W 9 Tax Forms Printable where can i print a w-9 form