In the recent decision of FYYB v FC of T 2021 ATC 10-592; [2021] AATA 3567, 5 October 2021, the Australian Administrative Tribunal (AAT) affirmed the Commissioner of Taxation’s (Commissioner) decision to disallow an objection by the taxpayer to an administrative penalty of $7,500 imposed on a self managed superannuation fund (Fund) under the Superannuation Industry (Supervision) Act 1993 (Cth) (SIS Act).