Table of Contents List of companies required to apoint internal auditorIn case of GST, a very detailed checking is required.Internal audit in GST: Following areas need to be checked by auditorGSTR-1 Details of Outward SuppliesGSTR-2A Details of Inward supplyGSTR-3B (Monthly/ Quarterly Return)E-way billInput service distributor (ISD) Internal audit in GST  is a very crucial aspect