GST Due Date for tomorrow i.e. 20-May-2024 GSTR-3B for the m/o Apr 2024 (Monthly Taxpayer - Rule 61) - Either Compulsory taxpayer > 5 cr. or Voluntary taxpayer < 5 cr. GSTR-5A for the m/o Apr 2024 [Return by OIDAR Service Providers - Rule 64.]