Purchase Return

That is what i want. The Return order should be created only for 3 Quantity by linking t to either Quarantine order or Quality Order.

Is it possible to avoid manual intervention to change quantity in return order? (instead of linking with PO i want to link it to Quarantine order or Quality order as it is already linked with PO). I want to return only rejected quantity defaulted from Quality results.

I want to return the material and also deduct money form supplier payable(debit to supplier) so which disposition group should i prefer.