Your taxable address will have to be somewhere in the US, ideally in a no income tax state like Florida. But I think you have figure out what states your company is registered to hire in. You can just ask your recruiter about what states employees currently live in.
After that, as long as the company is cool with 100% remote, I’d just get back on the road and head to Argentina.
I’ve heard multiple times that they’re not a good place to get work done. Too noisy, too distracting but otherwise fun.