This volume explains the complexity of the US tax system, often by comparison and contrast with European and other national tax systems. Use of highly technical language is avoided in consideration of those readers for whom English is their second language. Sufficient detail is incorporated to answer most primary questions about what makes the US tax system work. Topics covered include individual and corporate income taxes, partnership taxation, special types of taxpayers (pensions, corporations) and the underlying "unwritten law" of US taxation. Special emphasis is placed on international rules, particularly inbound business, sales and investment. Broad coverage is given to anti-avoidance rules which contribute to the US tax system's complexity. References to the Internal Revenue Code, Treasury Regulations, major rulings and cases are also included.