Are you buying things wholesale and reselling them? You need a reseller's permit!
 
A reseller license certifies you don't have to pay sales tax when buying products on a wholesale basis for the purpose of reselling them to customers. In some states, a reseller license might alternately be called a reseller permit, resale license, resale certificate, sales tax permit, or some other term.
Processing Fee / Filing fee's additional  IF apply. ( Varys state to state )