Why is my opening balance still showing the same amount even after I made it zero?
If the opening balances still showing the same even after made it zero, then might be these possible reasons:
1. The account master has not been saved properly.
2. Might be you are checking the wrong ledger report.
3. May be the master balance is not updated so you need to run Update Master Balances from the Housekeeping menu.
Note: Take backup of your data before running this process.