From BUSY you can generate the GST returns and upload to GST Portal. To generate GST returns from BUSY can follow these steps:
Step 1: Open the Display menu and select GST Reports.
Step 2: Choose GST Return and then the return type you want to generate, such as GSTR-1 eReturn, GSTR-3B eReturn, etc.
Step 3: Choose the report format you want to generate, such as JSON, CSV File, As per Govt. Template, or Plain Excel.
Step 4: Now enter the period and can generate the selected return as per the selected format.