Navigating U.S. Tax Returns as an Expat: Key Challenges and Solutions For U.S. citizens living and working abroad, the annual ritual of filing tax returns comes with unique complexities. Unlike many countries, the United States taxes its citizens on their worldwide income—regardless of where they reside. For expats, understanding the labyrinth of U.S. tax regulations, available credits, and international reporting requirements is essential for staying compliant and avoiding costly penalties. ...