Goods and Services Tax, envisaged as the single biggest tax reform since independence, is aimed to remove tax barriers between states to create a single market. GST is going to replace plethora of indirect taxes currently imposed at various stages of manufacturing, trading, etc. The implementation of GST will help to create a common national market and reduce the cascading effect of taxes on the costing and pricing of goods and services. It will have a far-reaching impact on almost all the realms of business operations in our country. It will impact tax structure, tax incidence, tax computation, supply chain optimization, credit availment and utilization, compliance etc., leading to a complete overhaul of the current indirect tax system in India. This book is written in a simple language adhering to all the recent amendments made for the Assessment Year 2020-21. The rules are explained along with number of illustrations. The Book is helpfull for all the students studying at UG and PG Courses.