Code Section 7701 (a)(30)
U.S citizens are U.S Persons and Citizens of foreign countries are U.S Persons who meet either of the following two tests:
Green Card test
Substantial...
The United States taxes its citizens on their world income even if they are not present in the United states. Canada taxes its residents on their would income. U.S Citizens...
For international transactions Governments have to decide which person and what income needs to be taxed. The basis for this can be personal relationship and economic relationship.
Personal...