Possibly, though she couldn't tell me which one would be faster. I had thought about using the form myself but decided to call in just to be sure that the refund is possible without penalties. The online version does not make that clear beforehand, running the risk of only getting the taxes back if for some reason the fare turns out to be not refunable. In which case it would be better to rebook into to another city pair that you would want to fly in the future.