Most restaurant checks that I see show the pre-tax cost, then the tax, then the overall total. I don’t tip on taxes either.
I’ve also always tipped in cash, never on a credit card (except when the meal was being charged to a company card). If the servers can beat the taxman, more power to them.
I used to do that, but between the illegals and the leftists who are most of the waiters in this area, no more. They can pay tax along with the rest of us.