My state sales tax exemption ID is on my purchase order. Do you still need documentation? Eddie Daggett November 13, 2019 18:30 Updated Follow Yes, we still need your state sales tax exemption ID and a copy of your tax exemption certificate sent to email@example.com. Click here for more information about sales tax exemption. Related articles My organization is tax exempt. What documentation do you need? Where can I get a copy of your W-9? How can I fund my purchase? Comments 0 comments Please sign in to leave a comment.