This document provides a comprehensive guide to the annual GST return filing in India, focusing on GSTR-9 and GSTR-9C. GSTR-9 summarizes all transactions of a registered taxpayer for the financial year, while GSTR-9C acts as a reconciliation statement that matches GSTR-9 data with the taxpayer's financial statements. The document also highlights key requirements, challenges, recent updates, and potential penalties associated with filing these returns.