Discusses two fundamental principles of US taxation of international transactions, i.e. tax jurisdiction and the source of income rules. Explains how the US taxes the foreign activities of domestic corporations, US citizens and other US persons. Includes chapters on the foreign tax credit, the deemed paid foreign tax credit, transfer pricing, controlled foreign corporations, foreign sales corporations and income tax treaties. Describes how the US taxes the US activities of foreign corporations, non-resident alien individuals, and other foreign persons.