Returns Manager allows you to intake returns from your customers through your Shopify storefront. The app lets you set which products are returnable as well as the timeframe that you'll accept returns for them.
Note: Returns Manager does not require any type of liquid coding install to function on your site. The app just has a small coding snippet you need to install on a "returns" page if you want to allow your customers to submit returns through the storefront.
Not sure how to get started with Returns Manager? Here is a step-by-step guide to help you on your way: