Request To Add An Option For Guests To Claim Tax Exemption On Online Orders

[Stella]

We are in a college town where many of our orders are tax exempt. We have had numerous times where guests will either be forced to call in or email their order because they can't place an order online (making it both inconvenient and frustrating for the guest who already built out their entire cart AND adding extra work on our end) OR they'll place an order online and we have to refund the tax, causing major paperwork headaches for us, especially when they contact us days or weeks (and sometimes even a month or two) later to refund the tax. 

If the online tax exempt feature has a way for them to input their tax ID number in order to remove the tax, that would be even better, but at it's core, I just want a way for them to be able to remove tax at the time of placing their order online and we can verify the tax ID number with them directly.