Bank Reconciliations function and I would like to suggest adding
Custom Fields for this tab.
The purpose for that is to add some supporting information about the reconciliation (or the discrepancy, if any) writing for example, notes about e.g. who (name of employee) made the reconciliation (especially when there are different users responsible for more than one accounts), why there may be a discrepancy (until it will be arranged), etc.
It is not something crucial, it is proposed only to have the capability to add more info (using custom fields) if required by users.