Ok so just to summarize:

I'm looking at booking a trip that goes Canada to Europe city, then from Europen city back. Let's say its 800 each way.

1. If I wish to get a travel credit for the return flights fare, I can cancel the return fare and get the credit put into a travel bank for me?

2. When would I have to cancel to do this? After the first departure but with 48-96 hours before the return I assume?

Thanks!