Interrelationship of tax liability with the principles of tax law

The article examines the relationship between tax liability and the principles of tax law in the current legislation and regulatory requirements of the European Union. The object of research is social relations that regulate the emergence, change, fulfillment, termination of tax liability in the context of the principles of tax law. The subject of the research is the norms of the Constitution of Ukraine, current tax legislation and other normative acts. During the research, various methods were used, in particular: historical-legal, systematic, comparative-legal, formal-legal, teleological, general scientific methods: analysis, synthesis, induction, deduction. It is indicated that the tax liability is the taxpayer's duty to pay the state a certain amount, which the taxpayer independently calculates and reflects in the tax return. It is noted that the principles of tax law and the principles of tax liability and taxation are mutually related and are reflected in regulatory acts of tax legislation or other regulatory documents. The Tax Code of Ukraine specifies the following principles: universality of taxation; equality of payers before the law, inevitability of liability; presumption of legality of the taxpayer's decisions: fiscal sufficiency; social justice; neutrality of taxation; stability; uniformity and convenience of payment; a unified approach to setting taxes and fees. Separate principles are defined in the Constitution of Ukraine - the principles of rule of law, legality, etc. The legal principle of the economy of taxation is manifested in the requirement for the economic basis of income taxation. In the tax law of the countries of the European Union, the presumption of legality of the taxpayer's decisions is expressed through the rules on the inadmissibility of various forms of tax abuse, which have a codified status. The development of these principles in the tax law of the member states of the European Union has recently taken place in the form of determining the criteria for the application of scientific doctrines in model taxation situations, based on specific court decisions in cases on determining the amount of tax liability.