Digitalization is revolutionizing various aspects of our lives, including the tax law. The article examines how digital economy is influencing the chosen principles of tax law. Digital technologies have the potential to make tax systems more transparent and efficient, simplifying tax compliance and administration for both taxpayers and authorities. However, they also introduce new challenges, such as ensuring equitable treatment for both digital and traditional businesses and avoiding double taxation of certain income or revenue. The article highlights how digitalization is reshaping the chosen principles of tax law and discusses the implications for future legal frameworks. The findings emphasize the need for forward-thinking tax policies to effectively adapt the evolving digital landscape.