GST Return Process 1. Furnish the detail of Outward Supplies within 10 days of close of the month in Form GSTR-1 (Section 37 of CGST) 2. Supplies details are to be given in the form GSTR-1(Refer below diagram for information to be given in GSTR-1). 3. These details will be auto transferred in Form GSTR-2A of the recipients.