The thesis is focused on the analysis of the transition from tax records to accounting system. The aim is to define the terms of the transition from one type of economic activity to another and theoretical analysis of this transition in order to model the change on a particular economic entity. The first part focuses on the general theory of tax management, accounting system and the definition of economic activities and their presentation. Following the analysis of legal standards and professional literature, a draft of the individual process steps has been drawn for the implementation of transition of an economic entity. The second part of the thesis is focused on the application of information obtained on specific existing economic entity...