Log into your Zip App and you will be able to see your Zip Rewards balance on the “Home” tab:
If you select "Rewards balance" you will then be directed to your Rewards page (below) where you will see your accumulated rewards and activity.
To link your Qantas Frequent Flyer account tap on “Manage” (see below):
You can then link your Qantas Frequent Flyer account by clicking the "+" as per below: