Discrepancies can be caused by one of the following reasons:
Reconciled transactions that were changed, deleted, or added after your last reconcile will affect the opening balance. Once a discrepancy is identified, make the necessary corrections to identify transactions that need to be fixed, use one of these reports.
Important: If you need assistance on how to make these corrections please consult your bookkeeper or accountant.
Reconciliation Discrepancy report
This report will show transactions sorted by statement date that were changed since the last reconciliation.
Verify Missing Transactions
Verify Changed Transactions
If you now have new transactions, or have modified transactions, you may need to do a mini reconcile.
If these solutions don't resolve the issue, you can read discussions and post messages and questions relating to your issue on the Intuit QuickBooks Community site for free. You can contact an agent for additional guidance. Fees may apply.