Abstract
The paper presents an analysis of viewpoints in the debate concerning tax harmonization in integration unions and the results achieved in the Eurasian integration process, focusing on the specifics of taxation in the EAEU member states.The findings have led the author to conclude that there are considerable differences in taxation approaches and the rates of major budget-forming taxes and excises in the EAEU countries and non-tariff barriers still exist in product and services markets, which is an obstacle for mutual trade and access of excisable goods to the markets of union states.Measures to refine taxation systems are identified with a view to expanding budget revenues and ensuring the competitiveness and financial stability of the EAEU member states.Such measures include the establishment of a unified identification system for foreign trade operators (UISFTO), enhancement of electronic services, automation of information exchange between tax and customs authorities and implementation of new tax administration mechanisms in digital trade.