You can create return forms from the Orders section by following the simple steps below.
Step 1: Open Simple Invoice from your Shopify store’s “Apps” section.
Step 2: Select the order you wish to create a return form, select print, download, or upload, and select the Return Form option from the dropdown menu.
Important Note: You can only print, download, or upload documents. It is not possible to directly send Return Forms. You can manually download and send it to your customer.
You can also customize the Return Form template from the Templates section.
In order to customize the template, Click on the Templates and select the Return Form from the Template Type dropdown menu.
After you make the necessary changes, Click on the Save button.