its more complicated than that. such as sales tax holidays and classifying stuff you sell correctly. i.e. packaged food might have no sales in some states but

its more complicated than that. such as sales tax holidays and classifying stuff you sell correctly. i.e. packaged food might have no sales in some states but what qualifies as tax free food can vary from state to state. to get this right, you have to make sure you are classifying everything in a very verbose manner that covers every single state.