QuickBooks accounting software provides tools to manage your customers, vendors, clients, inventory and finances. ... QuickBooks automates many aspects of managing your business by calculating sales tax, tracking products and automatically updating transactions in your register, customer and vendor areas.

Solutions to Fix Discrepancies while Reconciling Bank Account

Modified, deleted or added transaction
There are a number of reports available in QuickBooks that will help you to identify the discrepancies and consequently solve the Bank Reconciliation problems.

Reconciliation Discrepancy Report: This report displays the transactions sorted by statement date that were changed since the process of last reconciliation.

From the Reports menu, select Banking and then Reconciliation Discrepancy. Choose the appropriate account, then select OK. Review the report to identify any discrepancies.

Missing Checks Report: This report verifies the missing transactions.

From the Reports menu, select Banking and then click on Missing Checks.

Choose the appropriate account, then select OK.

Review the report for transactions that don’t match your bank statement.

Reconciliation adjustment
A previous Forced Reconciliation which might have resulted to a reconciliation adjustment may also be a cause for the QuickBooks Reconciliation Problems. Consequently, you need to review the Reconciliation Discrepancy account for any inappropriate adjustments.

Go to the Lists menu, select Chart of Accounts.

Double-click the Reconciliation Discrepancies account.

From the Dates drop-down, select the appropriate filter.

Hope this helps you out.
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Regards,
Jake Paul.