This document provides an overview of the key GST return forms and processes in India. It discusses the various monthly, annual and other periodic returns that must be filed, including GSTR-1 for outward supplies, GSTR-2 for inward supplies, and GSTR-3 for the consolidated monthly return. It outlines the returns due dates and details to be provided. It also summarizes the process for matching inward and outward supplies between buyer and seller, communicating discrepancies, and rectifying errors. Finally, it briefly discusses the first return, final return, annual return, and penalties for non-compliance.