US Code - Chapter 1: Normal taxes and surtaxes

Subchapter A Determination of tax liability
Subchapter B Computation of taxable income
Subchapter C Corporate distributions and adjustments
Subchapter D Deferred compensation, etc.
Subchapter E Accounting periods and methods of accounting
Subchapter F Exempt organizations
Subchapter G Corporations used to avoid income tax on shareholders
Subchapter H Banking institutions
Subchapter I Natural resources
Subchapter J Estates, trusts, beneficiaries, and decedents
Subchapter K Partners and partnerships
Subchapter L Insurance companies
Subchapter M Regulated investment companies and real estate investment trusts
Subchapter N Tax based on income from sources within or without the united states
Subchapter O Gain or loss on disposition of property
Subchapter P Capital gains and losses
Subchapter Q Readjustment of tax between years and special limitations
Subchapter R Election to determine corporate tax on certain international shipping activities using per ton rate
Subchapter S Tax treatment of s corporations and their shareholders
Subchapter T Cooperatives and their patrons
Subchapter U Designation and treatment of empowerment zones, enterprise communities, and rural development investment areas
Subchapter V Title 11 cases
Subchapter W District of columbia enterprise zone
Subchapter X Renewal communities
Subchapter Y Short-term regional benefits

Income taxes

Tax on self-employment income