Three sets of pages. What you owe when you leave, what you owe every year once you arrive, and what your passport is worth on the way.
65 passports by mobility, years to citizenship, dual nationality, and whether the tax follows you.
The engine takes what you earn and what you hold, then orders every address on the board against it.
Rank the board against my position →90 seconds. No account, no payment.
Tax figures use a simplified marginal model with indicative 2026 brackets for a non-US single filer, ignore social contributions, most deductions, wealth taxes, and treaties, and are not advice. Residence rules change often. Verify before acting.