Download W9 Tax Form – The IRS forms W-9, Request for Taxpayer Identification Number (and Certification) are all generally used. If you have your personal business or work as an independent contractor, a client may request that you fill out and send a W-9 so they can accurately prepare your 1099-NEC form and report the payments they make to you at the end of the year. Download W9 Tax Form how to get a w-9 tax form