How do I pay for taxes, fees and charges applicable to my Business Rewards award booking?

Taxes, fees and charges must be paid for at time of booking.

Do I have to pay anything extra when upgrading my booking using Skywards Miles?

Do I have to pay anything extra for upgrading a booking using Business Rewards Miles? If yes, how do I pay?

Do I have to pay anything extra when I upgrade my booking using Skywards Miles?