Hi Kiran,
First let me admit that I have not worked on IS RETAIL yet, hence what I would propose will be limited to Standard SAP ECC QM functionality only.
Well, based on your feedback, looks like your business wishes to implement a lean Quality Notification as a management step, to manage return delivery form customer. But it seems there is no such need to manage the flow using QM using Inspection type 06, following the thread - Customer return,inspection type 06 | SCN. (Thanks to all original contributors for attached SCN discussion thread!!)
But, as you already informed that you are interested in generating credit note/Return Material/Cash, etc, hence you may need to capture the above processes using Notification tasks, with some add-on controls.
On high level, you can use notification type "Q1" [Customer Complaints] and try executing below tasks to manage the flow -
Task1 => Create Return Sales Order (VA01) => Execute this task so that the task status becomes TSCO. Please populate the return order number in the 'description/text' tab against this task.
Task2 => Once this task is complete, only then you can process the task 2 (return Delivery). Update the Return Delivery number against task 2 - 'description/text'.
Task3 => Once this task is complete, only then you can process the task 3 (PGI). Material document should be saved against the task3 description/text.
Task4 => Once the task 1/2/3 are complete, you can launch the task4 related to settlement (credit note/Return Material/Cash). Add the same as reference in description/text.
NOTE: Working with ABAP team, you can make the updates of the respective document number in description or long text after execution of the processes. You can also use "Action Box" to map these requirements and complete the notification processing.
You can anticipate some better answers for other experts as well.
Thanks,
Arijit