Every cross-border tax question eventually collapses into the same underlying issue: is this dollar of income U.S.-source or foreign-source? It sounds like a formality, but the answer drives some of the most consequential numbers on an international return — the foreign tax credit limitation under IRC §904, whether a nonresident alien owes U.S. tax at all under §871 or §882, which income falls into which FTC “basket,” and how a tax treaty's sourcing tie-breakers apply.

If your Green Card has expired, or you're starting to think about giving it up for good, there's one myth we need to clear up right away: a plastic card expiring is not the same thing as ending your U.S. tax residency.

Should you amend a tax return — or wait? In domestic filings, corrections are often straightforward. But when foreign income or international reporting is involved, the decision becomes more strategic. Missed foreign income, FBAR filings, and forms like 8938, 5471, or 3520 can carry penalties even if no tax is owed. This article explains when amending reduces risk, when waiting makes sense, and why international corrections require careful evaluation before taking action.