Welcome to the Community, @accounts346.

The QuickBooks balance is the total balance of all bank transactions that you’ve added or matched to the system. While the bank balance is your bank's actual balance from the last bank feed update.

Also, below is the list of other possible reason why these balances don’t match:

• Outstanding transactions.
• New transactions for a connected account.
• Duplicate transactions.
• Edited or deleted transactions.
• Card (liability) account.

Depending on the factor mentioned above, there are different steps to fix this issue. Let's start by reviewing your opening balance and ensure that it's correct.

Here's how:

1. In QBO, go to the Accounting menu at the left pane to get to the Chart of Accounts.
2. Locate the account and click View register in the Action column. 

For more information about the process, refer to this article: Fix beginning balance issues if you've reconciled the account in the past QuickBooks Online.

Please know that I'm only a post away if you have any other issues or concerns. I'll be here to assist. Have a great day!