I know that currently there are states who are collecting these sales taxes, as they were allowed to do so by the initial moratorium. And without that moratorium, all the states would jump in there, immediately and start collecting the sales taxes for their respective states (as indicated by the above articles supplied for all to read...).
As far as the Constitution trumping the 10 Amendment rights of the states in collecting the sales taxes for their individual citizens..., I think you’ll be surprised when the new comprehensive sales tax regime comes into place, with all the states working together on it, to enforce it across the board. It’s being worked on right now with all the states.
They’re not going to work against *each others’ interests” because they are the same interests for their own states... LOL...
You have zero Constitutional arguments, so there is no point in continuing this.