I thought about changing it for a new date - it's actually not that bad (about $300 extra + $300 change fee), but I won't know what date is going to work until a few months later, and much after the actual return.

It would be great if I could somehow delay this "change" until later under similar rules.
The return is TPE-NYC, and I am ok keeping the same origin and destination for another trip later in the summer.

Can't seem to find the fare basis - I thought it should be on the ticket receipt, but it's not there.