Drop Ship

Can anyone give me insight on how you can handle the tax situation for drop
ships? From what I can tell, Edwards only allows you to identify tax
explanation code and tax area code on the sold to and ship to accounts. If
you drop ship an order to somewhere other than the state of the ship to can
you have Edwards refer to some type of certificate file that knows if the
customer is tax exempt in that drop ship state? Any help would be
appreciated. Thanks.