They used to, but I don’t think that’s a common thing anymore. The few things that still print the price, like certain candy and Arizona iced tea, have a separate price at most places I’ve seen lately

Even then, they could just factor it in… They would make less on each unit in more expensive states, but it is an option. I saw that in places when I lived in France - and everything ended in round numbers too, it makes shopping so much more pleasant