You can access the Refunds by Date Report from the Menu drop-down. Reports > Finance Reports > Refunds by Date. The Refunds by Date Report displays all the refunds in a selected time frame. The printable report can be exported to file.
HTML Report
The HTML Report breaks down the all the order transactions that have been refunded for your entire store. Click on Details and you will get all the information in the Order Manager. In the Type column, a partial refund will be listed as 'partial'.
Printable Report
The Printable Report automatically gives you a printer-friendly report with the same information as the HTML Report. You can export the Refunds Report by clicking on the Select Export Format drop-down. You have many formats to select, including .pdf, Rich Text, .csv and other format types. The Printable Report will show totals for the refunds. If you are going to use Excel to view your exported file, I would recommend utilizing the .csv export.
NOTE: The Refunds by Date Report will give you accurate refund information for all refunds.