Steps to file GSTR3B

Open https://services.gst.gov.in/services/login

Login to the portal using username and password.

Click the button Services>Returns Dashboard>Returns.

Select current financial year, quarter and month.

Click the button 'Search'.

Go to GSTR2A. Click the button 'VIEW'.

Go to Part-A and click the button 'B2B Invoices'.(can also download the invoices)

Compare invoices (in portal) and purchases you have entered in google sheet for that particular month.

ERP should have all the invoices present in the portal either in the form of purchase invoice or expense claim.

Go to 'Monthly Return GSTR3B' and click the button 'PREPARE ONLINE'.

Click 'No' (if you don't want to file NIL return)>Click 'NEXT'.

Click the 'Close' button to close the popup.

Go to table 3.1 Tax on outward and reverse charge inward supplies.

Click 'OK' on the popup message.