US tax rules for people with a foot in two countries
On a visa, with savings back home, selling a US flat from abroad, or holding new startup shares: a few US rules catch people who never heard of them. Start from your situation. Each one leads to a calculator.
This site is general information, not tax or legal advice. Tax rules, thresholds and forms change, sometimes every year. Where a figure changes by year, the calculator says which year it uses. Treaties, dual-status years and state rules can change the answer.
Two Shores is independent and is not affiliated with the IRS, the Treasury or FinCEN. For your own case, confirm with a qualified tax professional and the official sources linked at the foot of each page.