How to i get the tax to show behind the price?

Example: e56 1ghz notebook $56 (inkl. tax)
or
Cellphone $89 (Tax not incl)


And one more question.
I get products from 2 different countries.
The first country costumers have to pay tax themselves when the packages arrives.
From the other country the tax is included in the price.
So i need a custom field taht gets displayed in thje product details right under the price where it says what country the products is beeing shipped from.