Because it levies taxes based on citizenship, the US tax system is distinctive. Nearly every other nation either levies taxes based on the domicile (so that only residents are required to file taxes) or taxes all income earned inside the nation, regardless of residence. In contrast, the US taxes all its residents on their worldwide income, irrespective of where they may reside. In 2022, many Americans who are expatriates will be uninformed of or uncertain about their US tax reporting responsibilities. For us expat taxes, if you need professional advice, then USA Expat Taxes is the name to go for.