In his contribution, Prof. Dr. Peter Fettke presents the application potential of new technologies in the tax area, shows relevant fields of design for the development of tax information systems and presents a maturity level model for the assessment of different development stages. As a result, central development lines and contours of the fourth discipline of tax science can be seen. The entire article is available in the magazine „Der Betrieb“ (Special edition Nr. 01/2018; p.19-24). You can also access the article here.