The Finance Bill 2021 has substituted the Section 44 of CGST Act, 2017, where annual return (GSTR-9) is required to be submitted along with self-certified reconciliation statement (GSTR-9C), earlier GSTR-9C was required to be certified by the Chartered Accountant or Cost Accountant. So there is no change in process of annual audit except for certification.
Source Taxguru