Tax advice for expats (Colombo)

Hi, i will be moving to SL for a 2 year stint somehwere in August. I need some advice on how the income taxes and what other applicable taxes for expats would work. Can anyone help me out on this ? Also how easy/diffcult is it opening an account in Sl and repatriating money overseas? and if there is any alternative solution anyone would suggest for newbie into SL?