New GST Notification 2021 I GSTR 1 Filing Blocked if GSTR 3B not filed I CA Satbir singh By CA Satbir Singh | January 2, 2021 0 Comment (Last Updated On: January 2, 2021) New GST Notification 2021 I GSTR 1 Filing Blocked if GSTR 3B not filed I CA Satbir singh