Warehouse wise tax calculation inax 2012

Hi All

Path: Any Indian Company/Procurement and sourcing/Common/Purchase orders/All purchase orders/purchase order/Tax Information

In PurchTable Form there is a tab ,tax information in there according to company address tax ,VAT,CST etc are showing

but i want according to warehouse the tax has to show .

In PurchLine_in there is only relation of CompanyLocation_IN to LogisticsLocation.recid .

so how i will do this customization .

Kindly help me on this .

Thanks & Regards

Sumit Sarit Samal