To Refund a transaction click on the three lines in the top left-hand corner of the screen.
Choose the Refund option and type in the passcode for the terminal. The Passcode is going to be the last 4 digits of the TPN number.
From this screen type in the amount you wish to Refund and then proceed with the transaction as if it were a normal sale.
It will prompt you to insert, tap, or swipe the card you are performing the refund to.
Once the refund is complete, a receipt will print confirming the refund was successful.