Tax Exempt Large Order

I have a tax exempt card for my organization and need help purchasing around 20 Microsoft Flight Simulator for the PC. I am unable to purchase them before hand due to strict tax rules for my State run organization.

Please advise on the steps I should take to purchase the Flight Simulator for our 20 computers.

I was thinking about setting up 20 different outlook/Xbox accounts and then using one as a master to gift the game to the others. I would need to navigate the purchase using our tax exempt status.

Thank you,

DD

:)