Award taxes are the same as the paid ticket taxes. And they are high.
I priced the following booking for you.
2 TK 006 V 12NOV 4 ORDIST
3 TK1192 V 13NOV 5 ISTTLV
4 TK1193 V 21NOV 6 TLVIST
5 TK 005 V 21NOV 6 ISTORD
USD 350.00 (fare)
USD 283.32YR (fuel surcharge / tax)
USD 5.50YC (tax)
USD 72.90XT (tax)
USD 711.72 (fare after tax / before service charge)
For an award ticket, you do not pay service charge but you pay fuel surcharge). For an upgrade award, you do not pay anything.