Re: Taxes for the Netherlands.
You can't have any tobacco received via post (check the TNT site, tobacco is one of the illegal things). But with EU packages they don't check on those things at customs (at least I don't think so. You can only have tobacco with you when you fly into the country and then the maximum is 250 gr.
If customs find any tobacco via post they will destroy it, you can only pay taxes for tobacco if you are a registered company who is allowed to import tobacco and then the prices mentioned by Blaat are correct.