This document provides an overview of key concepts related to the Goods and Services Tax (GST) regime in India, including the concept of supply, nature of supply, GST rates and exemptions, input tax credit, returns, documentation, and tax deducted at source. It defines supply, explains the dual GST structure of CGST and SGST/IGST, and clarifies whether transactions constitute intra-state or inter-state supply. Schedules are referenced that specify activities treated as supply and clarify supply of goods versus services. The time of supply is also summarized based on the type of transaction.