Hey there, mikehenry.
I'd be glad to lend a hand so you can get your balances matched up.
As Rustler mentioned, comparing your bank statement to your register transactions in QuickBooks is a sure way to narrow down the differences. I recommend doing this and then completing monthly reconciliations to make sure the balances don't get too thrown off in the future.
I've got a few articles that will help you get started:
I'm just a comment or post away if you have any other questions.