Correct the original starting entry rather than entering the same opening amounts again.
1. Find the source
Review the posted record under Accounting → Opening Balances and identify the journal for the incorrect starting balance.
2. Open the journal
Go to Accounting → Manual Journals. Open the genuine opening-balance journal and review the date, accounts, amounts, and opening equity.
3. Choose the permitted correction
Use the supported edit or reversal action after reviewing the effect with your accountant. Closed periods or linked settlements can restrict a correction.
4. Verify the new position
Check that the intended balance is now correct and that old sales or bills have not been counted twice. If the opening is already partly settled, review its linked payments before changing it.