Here we would like to draw your attention to VTFF transaction code in SAP. As we know it is being used in the SAP SD-BIL (Billing in SD) component which is coming under SD module (Sales & Distribution).VTFF is a transaction code used for Bill to bill copying control in SAP.
It comes under the package VF0C.
Transaction VTFF technical data table
|Purpose||Bill to bill copying control|