The aim of the bachelor thesis is to analyze the development of tax crime in the Czech Republic in the years 2010 to 2020. The theoretical part explains the basic theoretical background that is needed to understand the investigated crime. It is based on legal and economic-sociological sources, especially an important article by Gary S. Becker. The practical part describes the tools used in the fight against tax crime in the Czech Republic, with a greater focus on electronic records of sales. Furthermore, an analysis of tax crime is performed, focusing on changes in development after the introduction of these tools. Based on the analysis, the thesis contains its own proposals for electronic records of sales and proposals that could help to c...