The tax system, as an integral area of the economic direction of state policy, urgently requires such construction and development that will be directly related to those main vectors of the state policy of socio-economic development, which will help ensure a sufficient amount of tax revenues to the budgets of different levels. In many countries around the world, the COVID-19 pandemic has led to a significant deterioration in the state of public finances. Containment measures, increased government spending, and reduced tax revenues have led to an increase in the budget deficit and public debt, which as a percentage of GDP has reached its highest level in several decades. Restoring public finances is a priority for all countries for many years to come. At present, in the Republic of Kazakhstan, it became necessary to develop a single document, the basis of which should be a system of indicators that determine the trends in the development of the macroeconomic situation in the region, as well as the influence of sectoral and regional factors of the current structure of financial flows on the state of the tax base and the prospects for its development. Purpose of the article is a substantiation of the role of the tax passport in assessing the tax potential of the region in modern conditions. The tax passport of the region should be considered as a document that allows assessing the existing tax base of the region, the level of the tax burden in the context of certain types of taxes in dynamics, by industry, as well as developing a forecast for the receipt of taxes and fees for the future, both under the current legislation and taking into account its possible change. When writing the article, the dialectical method of cognition, the methods of scientific generalization and classification, the method of systemic and comparative analysis were used. The introduction of tax passports will mean the beginning of a qualitatively new system of tax collection, corresponding to market conditions and the scale of the revival of the economy, that will contribute to a change in the tasks of the tax service (there is a need to predict the volume of tax revenues in the medium term, develop new concepts in the field of taxation that contribute to the development of business without prejudice social programs, substantiation of tax programs to ensure protectionist policy in the field of foreign economic activity).