Executive summaryThe Bulgarian National Assembly approved, on 31 December 2019, the amendments to the Tax and Social Insurance Procedure Code implementing the European Union (EU) Directive on the mandatory disclosure and exchange of cross-border tax arrangements (referred to as DAC6 or the Directive).The Bulgarian legislation entered into force on 1 January 2020 and will be effective from 1 July 2020.The final Bulgarian Mandatory Disclosure Rules (MDR) legislation is broadly aligned to the requirements of the Directive.No explanatory notes or further guidance were issued with the legislation amendments. It is not yet known when the National Revenue Agency or the Ministry of Finance will...