At the highest level. The Kirchhof/Seer is the essential standard work for anyone involved in explaining, advising, judging, or teaching in income tax law. Following the numerous changes in 2024, including those from the Growth Opportunities Act and the Annual Tax Act 2024, which expands the tax exemption for small photovoltaic systems and allows for the transfer of book values between identical partnership companies, users will receive the necessary guidance and recommendations for successful client consulting and tax planning. Keeping all changes in view. The analysis particularly focuses on supreme court rulings, administrative practices, and relevant literature that are primarily of interest for consulting. Individual cases are documented in numerous ABCs related to the respective regulations. The legislator responds to the rulings of the Federal Constitutional Court (BVerfG) and the Federal Fiscal Court (BFH) with the Annual Tax Act 2024. This includes numerous new regulations, such as the tax exemption for small photovoltaic systems, the tax exemption for income from debt relief, the transfer of book values between identical partnership companies, the assessment of building depreciation based on special depreciation, the deduction of special expenses for retirement contributions, tax-privileged equity interests for employees, the elimination of the loss offsetting circle for derivatives, and the deferred taxation of benefits from foreign occupational pension schemes and joint ventures in private sales transactions. New limited tax liability income. The Kirchhof is also available online, optionally with Answers in the tax law action module. A work by a highly renowned publisher and an excellent author team from the judiciary, tax science, and financial administration.