What's the difference between a referenced and unreferenced return sales order?

A referenced return sales order copies the project and task details from the original sales order. To allow the removal of the project and task from a referenced return sales order, set the Allow User to Remove Project Details on Reference Returns parameter to Yes.

An unreferenced return sales order requires the order entry clerk to enter those details manually. When creating a referenced return sales order, you can remove the project and task details before submitting the order if the project is no longer valid or you want to return the goods to common inventory.