Need Help in Configuring Import Tax

Hi Experts

i have a scenario in Material Import where Tax Has to be Paid to Import Tax Authorities  not to the Main Vendor.

CIF Value = 100 Rs.  (Paid to Main Vendor)

VAT on CIF (Deductible )= 20 Rs. (Should be paid to Import Tax Authorities also it has to be paid before clearing the goods)

Please Help me to configure the Above scenario.

Regards

Viru