If you want to add the return leg (if you find the award flights you want online) to the already booked award this can only be done on the phone with Qantas. There will likely be a change fee of 5000 points per ticket. The whole thing will need to re-ticketed, potentially risking the flights you already have (see numerous threads on this issue). And as per my experience above that's even if you can find a Qantas call centre operator who knows what they are doing (unless you have status and can get through to Hobart). Ultimately from my personal particular situation I found it easier just to cough up the extra cash. But you may have different cash restraints and therefore a different perspectiveI've booked an award to japan already, looking for the return, hence my question can i somehow link the return leg to get the cheaper taxes?