In the future, digital technologies will make it possible to increase the transparency of the economic activities of tax organizations, the transparency of the economy of all economic entities in Russian Federation, which guarantees the stability of receipts to the country's budget, an improvement in the quality of budget planning and economic stability. The purpose of this study is to substantiate the optimization of the economic activities of tax organizations based on the introduction of digital technologies. The object of the research is the economic activity of tax organizations. The subject of the research is digital technologies as a factor in optimizing economic activity and the sustainability of tax organizations. The analysis of the efficiency of tax organizations is presented. The author's vision of the influence of digital technologies on the optimization of economic activity is given on the example of the branch of the Federal Tax Service of the Russian Federation in terms of tax control and the provision of public services. It is concluded that the optimization of the economic activities of tax organizations based on the introduction of digital technologies will reduce the costs of current activities, tax administration, time costs for tax transactions.