Checking my BHX-PRG-SKG tix- it's gone up by a massive amount recently...is it meant to be an all-encompassing code for lots of different tax codes where there is no space to display everything??
ADT BHX OK X/PRG OK SKG 507.43NUC507.43END ROE.543909OK
XT8.18CZ40.30YQ
EV-478.00 TX-76.36 TTL-554.36 YFLUKOW
Since you don't say, I'm assuming you are flying OK. The above is what is called the fare ladder or fare calculation. If you have a ticket receipt for a flight, it is on there. The XT tax breakdown is
bold - breakdown is 8.18CZ and 40.30YQ. There are also 8.66GB and 19.22UB taxes, which will be separated in the total fare at the bottom of the ticket.
Since I am in the US, this shows everything converted to US$ so your amounts may show differently, but the format should be about the same.
Used to be all the taxes (when there were only a couple) were all broken down individually. However, sometimes there are upwards of 20 different taxes that can apply, so they use the XT code to total them. Note that fuel surcharges are usually a 'Q' charge, and they usually appear in with the city pair/fare info, not in the tax breakdown as they are not a tax.