Find the previous sale by going Sales and click on the sale you would like to return.
At the bottom of the sale, you will see a button that says Exchange,Refund.
In the pop up, you can individually select items from the sale to add to the return, or if they are returning all items from the sale, you can push Select All at the top of the pop up.
Then click add to return cart. Now the items will be in a faded pink cart with a dark colored Refund Button.
Once all return items have been added to the cart, hit the dark blue refund button.
You now have the option to refund back to the original form of payment, or select a different refund method.
Once you select the refund method, complete the return and print/email the receipt.