Terminology The following abbreviations are used throughout this article.ITA: Income Tax Act of Korea (소득세법). "ITA-ED" refers to its Enforcement Decree.VATA: Value-Added Tax Act of Korea (부가가치세법). "VATA-ED" refers to its Enforcement Decree.RSTA: Restriction of Special Taxation Act of Korea (조세특례제한법).Korea–UK Tax Treaty: Convention between the Government of the Republic of Korea and the Governmen..