Abstract
The chosen topic is up-to-date from the point of view of ongoing discussions on tax obligations of both physical and legal persons. The issue of the "abuse of the tax system" is kept in constant focus by the European Union and is moving towards increased international co-operation in tax administration.
The paper deals with the latest amendment to the Tax Procedure Code which was an immediate response to Council Directive (EU) 2016/2258 of 6 December 2016 amending Directive 2011/16/EU as regards access to anti-money-laundering information by tax authorities (the so-called DAC 5). The adoption of the amendment to the Tax Procedure Code affected the obligation of secrecy of the so-called obligated persons not only from the financial sector but also including attorneys, tax advisors, private execution agents, notaries and other professions.