Posted for "Bruce Gray" <Bruce@glasair.org>:

 I'm not a lawyer but out of state companies aren't subject to the laws
 of any state unless they maintain a company office within that state.
 The MI tax office would have no authority to audit an AZ company.
 
 Many states are pressuring congress to close this loophole. To force
 companies to collect sales tax for each state in which the buyer
 resides. Of course the next step, if this happens, is then the state
 will go after the company for a share of its profits in the form of
 income taxes. Money hungry bureaucrats.
 
For instance, at OSH each year vendors must collect WI sales tax on all
 sales at the airshow and file a sales tax report with the state. OK, but
 then the state of WI, according to several out of state vendors, them
 for WI annual state income tax returns.
 
 Bruce
 www.glasair.org