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
Verify Missing Transactions
Verify Changed Transactions
Note: If you have new transactions to add to the reconciliation period or have modified previously reconciled transactions, you may need to do a mini reconcile.
Forced Previous Reconciliation: A previous reconciliation may have been forced (entering an adjustment).
Review the Reconciliation Discrepancy account for inappropriate adjustments. (You must have first reconciled the account and entered a Reconciliation Adjustment)
Unable to determine discrepancy through Reports
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.