1. Login to your AfterShip Returns Center account.
Go to Settings -> Returns Page and Copy your Customization > Copy your Returns Page URL
2. In Shopify > Online Store > Navigation -> Main Menu and Click on "Add menu item"
3. Enter a Name for your "Menu Item", enter the "Returns Page" URL and click "Add".
4. Click "Save Menu"
5. Returns Center will be added to your Store Menu as shown below