The IRS issued reminders to withholding agents about the requirements related to withholding on U.S. source income of non-resident aliens. It also includes an update of requirements to file and deposit along with other tax compliance matters.
This section describes the rules for determining whether income is U.S. source or foreign source. It also describes the characterization of income of foreign persons, and the rules for currency conversion.
Aliens temporarily present in the United States as students, scholars, teachers, researchers, exchange visitors, and cultural exchange visitors are subject to special rules with respect to the taxation of their income.