xadria welcome to Flyertalk and especially welcome to the QR forum.
Reward flights are subject to a number of fees in special circumstances. See
http://www.qatarairways.com/Privileg...ge?mid=5&sid=1 for details. The fuel surcharge for reward flights was abolished two years ago. Airport and government fees will be charged as normal and they vary from airport to airport and from government to government. You need to make a dummy booking and examine the price breakdown to see what they will be. Remember that the fuel surcharge (YQAC) will not be levied so you need to be careful with that figure if it is listed in the fee breakdown. Remember also that some airports also have different fees according to cabin class.
Just relax, sit back and enjoy flying with QR.