Taxes have been known since the beginning of mankind. Tax collection was carried out in different social systems for different needs, depending on the structure that prevailed. Modern social systems and communities as they exist today have entrusted tax collection to tax administrations, in order to distribute them to finance public needs such as education, health, pension systems, culture, sports. The digital transformation is considered the 4th industrial revolution dominated by advanced technologies and technological solutions based on the development of the Internet. New business models are emerging, much of the trade is done online, payments are made by phone, computer, communication takes place through digital channels, strong network communities are being created. Tax administrations are implementing new advanced technological solutions in their operations in order to make it easier for taxpayers to fulfill their obligations within their competence. Platforms are being introduced through which entrepreneurs record business changes, thus reducing the time required to file taxes, minimizing errors in recording tax liabilities, and updated data was available in real time. Modern two-way communication channels are opening up, enabling the availability of tax administration services at any time, from anywhere. Many tax administrations in the world have made significant strides in the scope of their business, which can be the basis for the implementation of advanced business and technological solutions in the business of the Tax Administration in Croatia. With new technologies in the future, the filing of tax returns, certificates and other acts in paper form would be replaced by digital forms. Complete digital transformation with the application of modern technologies in business processes, create a modern, cheaper and more efficient Tax Administration with minimal administrative burden for taxpayers.