Hi,
No unfortunately by phone.
I found a guide that is saying that for this year (2017) it should be 90% of the 2017, 100% of 2016 etc.
I contacted again the revenues and the answer has been:
We are all in the same ship. If you don't know what will be the tax for the 2017 pay what you have until now and then amend it asap.
At this point let's see.