General Rule:IRC Section 7701(b)establishes the guidelines for determining when an alien individual is a resident for federal income tax purposes,1subject, however, to such modifications as U.S. treaties may authorize.2
IRC Section 7701(b) provides an objective definition of a resident alien individual. An individual who is neither a citizen of the United States nor a resident alien under the statutory definition is a nonresident alien.3 That rule leaves U.S. Nationals4