Our constitution prohibits federal government from doing anything directly to the people. Yes you are right, the federal taxes are unconstitutional. Nearly everything the government does is on constitutional.
Generally speaking, federal government gets its way with the states by bribing them with money.
But in the case of the injection mandates, they said something that sounded like a mandate, the Mainstream Media says it is a mandate, and then corporations pick up on it and do the mandating saying it is fed mandate.
It is a Deception!