American digital nomad (not an accountant) here that transitioned an on-site w2 job in SF to full remote.
state taxes: I initially moved to FL where there is no state income tax. I have a FL driver's license and mailing address. In FL, you do not have to file anything.
federal taxes: I will qualify for FEIE [0] by being outside of the USA for the qualifying amount of time which basically means I do not have to pay federal income tax on my first ~$105k, but I still need to pay FICA.
In theory, most countries that I visit, I probably should be paying their taxes, but since my money only stays in America, the risk of getting caught is very low.
It is my understanding that there are things that can be done to get your taxes down to 0% if I was a contractor, but I don't make enough for me to take advantage of that.
[0] https://www.irs.gov/individuals/international-taxpayers/fore...