GSTR-9C is an annual GST reconciliation statement that underwent a major change in 2021. The Form GSTR-9C was earlier applicable to businesses with more than Rs.2 crore as annual turnover in a particular financial year. It required the audit of books and records of that year by a chartered accountant or a certified management accountant and their certification. These requirements are removed from the financial year 2020-21 onwards. Instead, Form GSTR-9C requires it to be self-certified by the businesses themselves.