If your store allows returns, you can enable this functionality on the Order Return Settings page.
To get started, navigate to Settings -> Order Return on the left sidebar menu.
Next, you just need to check the Enable order return checkbox.
You will then see in the shipping section of any order that has a Fulfilled status that the Return button is available as shown below.
That's everything that you need to know about the Order Return Settings. In the next article, we will look at the User Settings.