Seems I remember some years ago now that the interstate laws were changed because local merchants were claiming they were at a pricing disadvantage because the internet sellers could sell it cheaper because of not charging sales tax and states were complaining they were not getting the taxes they actually were owed.
So the laws were changed that sales tax for the state being shipped to had to be collected by the internet sellers and sent to the states.
Legally at least in my state prior to the laws change the resident was supposed to claim and pay the due taxes to the state on all out of state orders when they did their yearly tax returns, but I know of no one that ever did so.
I do occasionally still get orders from some internet companies that fail to charge the sales tax but it is pretty rare these days overall.
The only way I know to find out is to go to theirr checkout stage of the order and see if sales tax is added to the total.
I do not think technically any companies should not be charging sales tax to a buyer in a state that collect taxes on the amount of a purchase with the laws as they are today.