Settings > Returns > Policies, under Return Policies.

Adds a link to your store's full return policy page inside the portal, so customers can check the details without leaving the return flow.

Keep your policy page in sync with your Onward settings. When you change a setting, check that the policy page still describes it accurately — particularly the return window, who pays for return shipping, restocking fees, excluded items, and whether refunds are offered.

If you use Exceptions heavily, it's usually clearer for the policy page to describe the default and note that some products differ, rather than enumerating every rule.