Here we would like to draw your attention to VE77 transaction code in SAP. As we know it is being used in the SAP SD-FT (Foreign Trade in SD) component which is coming under SD module (Sales & Distribution).VE77 is a transaction code used for Preference: Tariff Alternation in SAP.
It comes under the package VEI.
Transaction VE77 technical data table
|Purpose||Preference: Tariff Alternation|