Here in The Netherlands, everyone is charged sales tax (it's always included in all prices that's communicated to consumers, required by law).

Companies pay sales tax to the state and can deduct sales tax they paid to other companies.

There are rules for applying sales taxes to other EU countries and it get's complicated fast; once you do more than X amount in another EU country, you're supposed to register in that country and file taxes in that country. Thresholds here: https://ec.europa.eu/taxation_customs/sites/taxation/files/r...