Here we would like to draw your attention to OVKH transaction code in SAP. As we know it is being used in the SAP SD-BF (Basic Functions in SD) component which is coming under SD module (Sales & Distribution).OVKH is a transaction code used for C SD Table TVAK Sales Document Types in SAP.
It comes under the package VZ0C.
Transaction OVKH technical data table
|Purpose||C SD Table TVAK Sales Document Types|