Part 1: tax jurisdictions internal revenue code IRS, regulations, rulings, court cases taxes not levied. Part 2 The unwritten law: origin assignment of income substance-over-form business purpose test. Part 3 Individual income tax: taxpayers taxes imposed and rates determination of gross income calculation of adjusted gross income calculation of taxable income income tax rates and credits anti-avoidance measures. Part 4 Partnership taxation: general partnership operations sale or acquisition of partnership interests termination of a partnership fiscally transparent entitites. Part 5 Corporate income tax: taxpayers taxes imposed and rates incorporation and capital contributions operation of companies liquidation special types of corporations anti-avoidance measures transfer pricing. Part 6 International taxation: out-bound business in-bound business.