how to put Custom Duty Tax

[rikesh]

Hi Im a new in prestashop and i have checked all the functions of prestashop its best but 1 main problem is prestashop is it doesn't have custom duty tax, its very important for any international ecommerce site. If Any of my customer buy a product from my site from uk then How can i include or show custom Duty tax to customers. One thing is I have to pay custom duty tax in 2 countries. 1 is in my own country and second is in delivery country. How can i show and calculate that.

Anybody now about that. PLease help me fast.