Code of Federal Regulations, Title 26: Part 1 Section 1.401 to 1.409 (Internal Revenue Service) IRS: Revised 7/30

The book outlines the regulations and procedures related to various tax categories, including income, estate and gift, employment, and excise taxes as defined by the IRS. It highlights that updates and revisions to these tax codes are published annually by April, with the official publication occurring within six months. This resource serves as a comprehensive guide for understanding the current tax laws and practices.