You are only entitled to a Government Tax refund if you have paid such taxes at the time of your booking. If government taxes were included in your ticket price, they will be displayed to you in the price breakdown at the time you make your booking.
Our higher ticket prices generally include government taxes, while our lower ticket prices do not. You can apply for a refund of Government Tax within one month of the date of departure of your flight if you did not travel.
You can apply for a Government Tax refund here.