Code of Federal Regulations, Title 26: Part 1 Section 1.501 to 1.640 (Internal Revenue Service) IRS: Revised 4/10

The book outlines the regulations and procedures established by the Internal Revenue Service concerning various tax types, including income, estate, gift, employment, and excise taxes. It highlights the annual updates and revisions to the tax code, which are made available by April each year, with publication occurring within six months. This resource serves as a comprehensive guide for understanding and navigating the complexities of federal tax law.