Introduction. In the current conditions of globalization of socio-economic development and formation of a new financial civilization, social aspects of tax policy take a important place. The system of taxation of income of citizens in Ukraine today is not fully coping with the performance of their functions. The experience of developed European countries on the formation of an effective mechanism of taxation of personal income will contribute to the establishment of the newest social and fiscal-oriented paradigm of taxation of citizens in Ukraine. The increased interest in the procedures for administering the personal income tax is also explained by the fact that this tax is one of the main sources of income to the budget of Ukraine. The purpose is to determine the peculiarities of taxation of personal income tax in Ukraine, to find out the common and different features tax system in Ukraine and European countries, to systematize recommendations on improving the mechanism of taxation of personal income. Results. The international typology of personal income tax systems is given. The general features of personal income taxation and mechanisms of application of personal income tax rates in some countries of the European Union are considered. It is argued that the implementation of the European tax experience will facilitate a faster transition to a new and effective system of personal income taxation in Ukraine. To improve personal income taxation in Ukraine, it is necessary to revise personal income tax rates, increase the amount of tax-free minimum incomes, ensure the full functioning of electronic declaration of personal incomes, optimize concessional policies, increase tax literacy and tax culture. Prospects. Further research will focus on the social aspects of taxing citizens' income in terms of differentiation of tax rates, the logic of using preferences in taxing personal income, the introduction of an effective threshold of the non-taxable minimum income, promoting the right to tax rebates, etc.

The article examines the essential determinants of decentralization and its main elements. Considerable attention is paid to scientific and theoretical aspects of the impact of fiscal decentralization on local economic development. Priority aspects of realization of bases of fiscal decentralization in the Ukrainian administrative practice are covered. It is proved that the key idea of ​​fiscal decentralization is manifested in the achievement of financial autonomy by local governments through the accumulation of financial resources at a certain level of government. Emphasis is placed on the concept of fiscal federalism and its role in the socio-economic development of administrative entities of unitary states. It is argued that the construction of an effective system of inter-budgetary relations should take into account a range of measures to strengthen the own tax potential of the territorial community. It has been established that recently the tax potential of local self-government bodies has been identified by tax capacity at the expense of three taxes: personal income tax, property tax and single tax. The study showed that fiscal decentralization through the prism of tax, budget and debt instruments can provide a favorable socio-economic climate in local communities. A structural and logical scheme of the impact of key paradigms of fiscal decentralization on the development of united territorial communities in Ukraine has been built. It is proved that fiscal decentralization in the conditions of divergence of interbudgetary relations can become a catalyst for effective fiscal stimulus policy, as delegation of budgetary powers to lower levels, while improving the efficiency of budgetary resources, will allow more fully and regionally respond to regional development and local needs.

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The article focuses on the need to study the current state of theoretical and organizational support of fiscal policy. Factors influencing the effectiveness of fiscal policy at the state and local levels are outlined. It is established that the imperfection of fiscal policy creates barriers to the activation of investment and innovation activities in local communities and the state. The normative and legal aspects of harmonization of fiscal policy in the European Union are considered. There are two areas of unification of local taxes and fees in Ukraine: the implementation of the principles of good governance in the field of taxation, the harmonization of the structure of the tax system based on the concepts of direct and indirect taxation. In the article emphasis is placed on the priority of fiscal federalism or decentralization in Ukrainian realities. The essential determinants of the fiscal policy of the state and the region have been identified. The key objectives of regional fiscal policy should be to guarantee financial independence and ensure the ability of the administrative unit's economy to develop itself. The tax potential of local budgets in Ukraine is analyzed. As a result, a low level of budgetary and tax autonomy of territorial communities has been established. In this regard, it is important to focus efforts on combating the spread and minimizing the effects of coronavirus disease (COVID-19) for individuals of fiscal policy. The need to increase the financial capacity of the amalgamated territorial communities has been identified. Guidelines for improving the organizational and legal support of fiscal policy in terms of intensification of Ukraine's European integration aspirations are proposed. It is argued that fiscal policy in Ukraine should be a catalyst for the development of priority sectors of the economy, innovation processes, investment activities in the regions, energy saving and environmentally friendly technologies, educational and scientific processes, digitalization of management at the state and local levels in the administration of taxes, fees, payments.