There is a "refunds" tab on the administrative dashboard which will list chronologically all the refunds processed for your organisation. You can filter the list by various statuses and dates.
If you want specifics on a particular refund simply click the row (there is no button, just click the line) to open the refund details overlay.
Each individual event has a report in the Financial Reports section called Refunds. This report will show all the refunds for that event and show the information contained in the on-screen refund details (above) in an Excel .CSV report format.
The payout / deposit reconciliation report will contain refund transactions as separate line items.