People do pay taxes in the US? I paid almost nothing in Texas, thats why it looked like a shithole. No budget for anything. In Europe I love to pay taxes, because I see where it's going to
Federal taxes are payable by all US citizens regardless of location.
State taxes… I can't say I know even a single thing about how it works when you leave the USA. I hear news, but I don't live in the US, nor do I want to. The way taxes are handled is one of many things contributing to that lack of interest, even with what little I do know about it being about federal taxation.
It's kind of a pain that you still have to file US taxes in this case. You may well end up paying zero in the US, but it's up to you to provide the necessary paperwork to show that your overseas income tax was high enough to cancel out the US income tax.