I remember my first meal on my first visit to the US 10 years ago. It was Subway I think. I see a price advertised, but to my shock I paid almost double that. Fee for dining in, sales tax, too.
10% and even a tip (though why one would tip a counter worker at Subway, I don't know) does not come close to 'almost double' that the poster claimed, however.
Is this the Lemmy that is said to be less toxic than Reddit? Maybe it wasn't Subway, maybe it was something different. It was 10years ago, I may be misremembering the details.
Did I remember everything correctly? Dunno. Are you being a dick? That's 100%.
Regardless, there has never been a tax for dining.
State taxes are in single digits and varies across states. Maybe you added a very generous tip which doubled your bill and you are calling that as dining tax.