Yes, you can create a journal entry to correct your opening balance, @paula15.
This way, we can make sure your book is accurate. Let me show you how:
- Click the + New icon and select Journal entry.
- On the first line, select an account from the Account field. Depending on if you need to debit or credit the account, enter the amount in the correct column.
- On the next line, select the other account you're moving money to or from.
- Check the amounts - you should have the same amount in the Credit column on one line and the Debit column on the other. This means the accounts are in balance.
- Enter information in the memo section so you know why you made the journal entry.
- Select Save and new or Save and close.

You can also reach out to your accountant for further advice in choosing the correct accounts. This will make sure that your records are correct.
Additionally, here an additional reference you use in fixing account issues you've reconciled in the past.
I also recommend running a reconciliation report to check your Beginning and ending balances. This will show you the lists of which transactions were cleared and left uncleared when you reconciled.
I'm just a reply away if you have other questions about correcting your accounts in QuickBooks. Just add the details of your concerns in this thread and I'll help you out. Keep safe.