Yes, you can manually adjust these balances yourself, and I'm here to guide you through the process every step of the way, Daniel.
Accurate bank balances are essential for reliable financial management, aiding in budgeting, forecasting, and compliance while preventing audit issues.
These steps will guide you through correcting any discrepancies in your account balances:
- Go to the Transactions tab and select Chart of Accounts.

- Locate the account and select Account history.

- Find and select the opening balance entry.
- Hit Edit to make changes to the opening balance.

- Click Save to apply the changes.
For more details on how to manage your opening balance, refer to this article: Enter and manage opening balances in QuickBooks Online.
Additionally, it's best to reconcile the account your account to ensure everything is accurate: Reconcile an account in QuickBooks Online
Keep me updated if you have further concerns with handling other banking-related activities. I'm always ready to give assistance.