Tarkwa, how is the life there, and what means tax free in my contract

Is anybody know something about Tarkwa, how is the life there, and what means tax free in my contract, if I should pay the incame for my monthly remuneration, how I think, how much is that?
Thank you for the topics

Tarkwa is in Western Ghana about 2 to 3 hours from Takoradi. It is not a very big place but there are lots of mines in the area.
I don't understand the rest of your questions. I would be a bit worried about the tax free nature of your contract as companies are not allowed by law to employ people tax free.