Working orders can be modified using the following API in ReturnManager:

protected Order createReturnAdjustedOrder(ReturnRequest pReturnRequest)
  throws ReturnException
protected Order createReturnCalculationOrder(ReturnRequest pReturnRequest)
  throws ReturnException
protected Order createPromotionEvaluationOrder(ReturnRequest
  pReturnRequest)throws ReturnException

The following properties configure the associated pipeline:

Use the following API in ReturnRequest to access working orders:

public Order getReturnAdjustedOrder()
public void setReturnAdjustedOrder(Order pReturnAdjustedOrder)

public Order getReturnCalculationOrder()
public void setReturnCalculationOrder(Order pReturnCalculationOrder)

public Order getPromotionEvaluationOrder()
public void setPromotionEvaluationOrder(Order pPromotionEvaluationOrder)

For additional information, refer to the ATG API Reference for Commerce Service Center.