Corporate tax law is characterized by constant changes in case law and legislation. This area is influenced not only by federal regulations but also particularly by European legal rulings. The work addresses classical questions in corporate, tax, and accounting law, providing a comprehensive overview of this complex legal field. Key focuses of the work include: - Fundamentals of corporate law, taxation, and organization, - Corporate contracts (conclusion, form, defects, termination), - Control and profit transfer agreements, - Issues of management and liability, - Taxation of the participation group, - Taxation of the consolidated group, and - Tax policy, such as loss utilization strategies or distribution policies. An appendix with sample contracts makes this work a practical guide.