You pay the full taxes , fees and surcharges as you would do with any normal booking.
So do a paid for dummy booking, in the class of travel, you require. at the end it will list the price and a breakdown of ticket cost and taxes/fees/i know you/hey we are ba/saw you comming/raw sausage inclusive/wouldn't happen on *alliance/eek that is alot/why do i bother/time to start a seperate thread on this/fuel surcharge
You will pay the tax and fees + miles for an award booking, brace yourself.