Gross income comes from following categories of income:
Interest, Dividends, Personal Services, Rentals, Royalties, Gains from disposition of property.
Leasing generates rental income....
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...
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...