• Subtitle A—Income Taxes (§§ 1–1564)
• Subtitle B—Estate and Gift Taxes (§§ 2001–2801)
• Subtitle C—Employment Taxes (§§ 3101–3510)
• Subtitle D—Miscellaneous Excise Taxes (§§ 4001–5000C)
• Subtitle E—Alcohol, Tobacco, and Certain Other Excise Taxes (§§ 5001–5891)
• Subtitle F—Procedure and Administration (§§ 6001–7874)
• Subtitle G—The Joint Committee on Taxation (§§ 8001–8023)
• Subtitle H—Financing of Presidential Election Campaigns (§§ 9001–9042)
• Subtitle I—Trust Fund Code (§§ 9500–9602)
• Subtitle J—Coal Industry Health Benefits (§§ 9701–9722)
• Subtitle K—Group Health Plan Requirements (§§ 9801–9834)