I have a one-way 70,000 mile award booked through SQ as follows:

TG662 BKK-PVG
AC026 PVG-YVR
AC554 YVR-LAX

Receipt lists the following taxes:

TS 29.50
CN 17.90
XT 305.80

Just curious... can somebody tell me what each of these taxes are for? I'm not familiar with the abbreviations. Thanks much!


Note: Posted here as it's SQ award, but perhaps it belongs in *A forum or TG or AC? Feel free to move if appropriate.