RMA are accessible though Inventory menu. There's four menus, divided by type.
Users can access to the list of RMA or RMA lines.

Create an RMA:

#. Select a partner. Enter RMA lines associated to an existing picking, or
   manually.
#. Request approval and approve.
#. Click on RMA Lines button.
#. Click on more and select an option: "Receive products", "Create Delivery
   Order".
#. Go back to the RMA. Set the RMA to done if not further action is required.