Conversions are important tools for companies to adapt to the changing conditions of globalized markets, facilitate transactions, isolate liability risks, prepare for business succession, and much more. The tax implications are governed by the Transformation Tax Act. The authors provide an overview of the systematics and fundamentals of this legal field in an easily understandable, proven case-oriented manner. All relevant areas are covered: the conversion of corporations into partnerships and corporations, the contribution of business units, share exchanges, and cross-border conversions.