Here we would like to draw your attention to VI88 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).VI88 is a transaction code used for Input Table for Preference Determin. in SAP.
It comes under the package VEI.
Transaction VI88 technical data table
|Purpose||Input Table for Preference Determin.|