Here we would like to draw your attention to OVD1 transaction code in SAP. As we know it is being used in the SAP SD-SLS (Sales in SD) component which is coming under SD module (Sales & Distribution).OVD1 is a transaction code used for /nse38/Special Billing Features in SAP.
It comes under the package VA.
Transaction OVD1 technical data table
|Purpose||/nse38/Special Billing Features|