Your clinic should be able to provide all the information. It should show what your cost will be before the safety net and after. The only difference between last year and this is:
1. Your 1st stim cycle in a calendar year is more expensive than any subsequent stim cycle in a calendar year regardless of if you have reached the safety net (although it is cheaper if you have reached the safety net than if you have not).
2. There is a cap to the rebate available - you still get up to 80% gap back if you have reached the safety net, however this is up to a set cap. This means if your clinic isn't ripping you off, you shouldn't be any worse off than prior to Jan 1.

Hope this helps - this is my understanding, haven't yet got my refund for my 1st cycle this year though!