ATO systems report | Australian Taxation OfficeJun 8, 2017 . The system outages that we experienced in December 2016 and February 2017 were unexpected and to our knowledge unprecedented. I can also say that in no way did our new products and services under our reinvention program cause the outages. Once the December outage occurred, we in the ATO.system lubriion new ato mill,Release of the ATO systems report | Australian Taxation OfficeJun 8, 2017 . Today the ATO has released a report into the systems outages we experienced in December last year and February this year. This report incorporates findings from our own internal review, as well as technical advice and a separate report prepared by independent expert reviewers.