AFAIK there is no sales tax for online services in USA, wherever you sell or buy. In EU it is complicated as you have to charge online buyer with his country VA

AFAIK there is no sales tax for online services in USA, wherever you sell or buy. In EU it is complicated as you have to charge online buyer with his country VAT and then reconcile this thru provider's country revenue VATMOSS. EU has 28 member states with differing VAT rules, add to this burden of proof to ensure where the buyer is located (two non-contradictory proofs) then you may understand why it was named #VATMESS.