Are you filing the correct GST return?
Under GST, a regular taxpayer needs to furnish monthly returns and one annual return. There are separate returns for taxpayers under the composition scheme, non-resident taxpayer, taxpayer registered as an “input service distributor”, a person liable to deduct or collect the tax (TDS/TCS) and a person granted Unique Identification Number.
So taxpayers are required to file returns depending on the activities they undertake. However, for the first two months, the return filing process has been simplified by requiring all taxpayers to provide just the summary details in form GSTR-3B while the forms for outward and inward supplies—GSTR-1 and GSTR-2, respectively—can be filed 25 days after they are first due. Here's a guide for you: