Return policy is required to list products on Etsy.
If you don't have a return policy configured on Etsy, you'll have to create one.
To create a return policy:
On Etsy.com, click your account icon, then click Shop Manager.
Go to Settings > Policy settings.
Click Create policy.
Fill out the appropriate policy details.
Click Save and apply.
Once you create and save a return policy, it can be applied to any future listings you add to your shop.