Field help (EXTRTNQTY)

The "Expected return quantity" field , expressed in the unit for the return, is initialized by the maximum quantity that can be returned with respect to the original delivery or the supplier return in the case of an inter-site or inter-company supplier return.
When the customer return makes reference to a delivery or a supplier return, it is not be possible to enter a quantity that is greater than the shipped (or returned) quantity less the quantity already returned.

 If it is a direct return line (not associated with a delivery), this field is initialized to zero. This quantity is no longer modifiable if the return line has been subject to a stock receipt.