Goods and Service Tax Act 2017 Amended up to 2020 Book. In this Book you will Know Central Goods and services tax (GST) Act 2017, THE INTEGRATED GOODS AND SERVICES TAX ACT, 2017, THE UNION TERRITORY GOODS AND SERVICES TAX ACT, 2017, THE GOODS AND SERVICES TAX (COMPENSATION TO STATES) ACT, 2017.