Originally Posted by
Tifosi
I don't have first hand experience but the terms on TK's site state that the fee is $25 US:
I'd love to hear from someone who's actually made changes to their rewards booking.
Yes, I have done this and it is $25. But be careful if you try the $25 recrediting; if the miles would have expired, they will cancel the flight without recrediting and not warn you that's the case (I would've changed dates the time this happened to me).