Yes,you can file GST return directly from BUSY but In BUSY software,you can only directly file GSTR-1 e-return.To Generate GSTR-1 e-return from BUSY Software you can
do these steps:
Step 1:Go to Display menu,
Step 2:Select GST Reports,
Step 3:Select GST Returns,
Step 4:Select GSTR1 e-return,
Step 5:After clicking, a window will appear with 5 options Direct upload, JSON, CSV, as per government template, and plain Excel.
Step 6:click on Direct.
Step 7:select the filing frequency,check errors and click ok, make sure your portal username should be mentioned in GST/VAT.
Step 8:If it is not mentioned,as you click OK,a pop-up will appear asking you to mention your GST portal username. Click OK on the pop-up, and the GST/VAT window will open. There, enter your portal username and save the window.
Step 9:After that,you will receive an OTP on your email ID or phone number,which you will need to enter on your BUSY. Once you verify the OTP, GSTR1 will be uploaded directly on Portal.