Hello, @April Union.

There are several possible reasons why your bank balance does not match. I can share some information to resolve this.

Let's start by reviewing the opening balance in your account to make sure it's correct. Here's how:

1. Select the Accounting menu,.
2. Choose Chart of Accounts.
3. Look for the account on the list.
4. From the Actions column, click View register.
5. Search for the opening balance entry.
   • This transaction should have an "Opening Balance Equity" in the Memo column. 

If there's an opening balance, let's make sure that it has the correct date and amount. While if there's no opening balance equity recorded, you can enter it by creating a journal entry. You can refer to this article for the detailed steps: What to do if you didn't enter an opening balance in QuickBooks Online.

On the other hand, you may have transactions that were not supposed to be reconciled. Let's run the previous reconciliation report to review it one-by-one. Here's how: 

1. Go to Accounting, then select the Reconcile tab. 
2. Click the History by account link.
3. Choose the Account and Report period.
4. Open the year with the statement ending date.
5. Click View report. 

To correct the reconciled period, you can undo the reconciliation process. For more insights, you can use this article: Undo and remove transactions from reconciliations in QuickBooks Online.

Lastly, you'll want to review your list of uncleared and cleared transactions.  You can look into the in-depth explanation that @PaulaS shared in this thread.
 

Always feel free to leave a comment below if you have other questions about managing your income and expense transactions in QuickBooks.