I am expensing airfare costs with my employer, and the reporting software asks me to specify the GST/HST portion of the expense. Reading the invoice for my flight from Toronto, through Montreal, to Las Vegas, I see a base fare (CAD) of 164.99, Total V.A.T/G.S.T/H.S.T. of $15, and Other Taxes of 132.12. The total invoice then sums to 312.11 CAD. I have never seen a bill with 2 tax categories like this and am not sure how the $15 and 132.12 were calculated, and which I should report as GST/HST in my company's expense report. Can you help me better understand how to correctly report the HST on my airfare?