I'm in need of information on submitting a show that was held on a nearby Indian Reservation. This is a catalog and all of the guests live on the reservation, therefore they are all tax exempt. I know there is a specific tax exempt number that I need from each guest, however I'm not sure if that is specifically what the number is called or if there is another name for it. (I believe this is similar to a tax-exempt organization placing an order, am I correct?) Has anyone held shows similar to this that can provide some feedback? Thanks a bunch!