
You can create a Credit Note for the Received Quantities on a Return Authorisation.
Go to the Order Tracker where the RA was created

Make sure you have complete the RA with the RECEIVED QUANTITIES - for more information, here is the manual.
Click the action button and select [Add Credit Note]
The Products tab shows all the products from the Sales Order and quantities are auto-populated from the RA 'Received Quantity'

You can amend if needed.
A warning icon will display if there are products with a quantity (Qty) greater than '0' with a unit price set at '0.00'. The message Product with '0' Value will appear when hovering over the yellow triangle.

Go to the tab 'Totals' to review

[Save] and [OT] or [Close] to go back to the Order Tracker

