Gather all GST records for the financial year
Reconcile outward supplies, inward supplies, tax paid, and input tax credit with books and returns
Ensure all monthly or quarterly GSTR-1 and GSTR-3B returns are filed
Log in to the GST portal
Go to Services
Select Returns
Select Annual Return
Choose the financial year
Open GSTR-9
Fill in the required details in all applicable tables
Verify turnover, tax paid, input tax credit, and demands or refunds
Report amendments, if any, made during the year
Check auto-populated values from filed returns
Enter additional details where required
Save the draft periodically
Preview the return before submission
Validate all entries for accuracy
Submit the return on the portal
File the return using DSC or EVC
Download the filed acknowledgment and ARN
Keep supporting documents and reconciliation statements for records