21 May
April 2019 monthly BAS due

26 May
Quarterly BAS for quarter 3, 2018-19 due

28 May
Pay FBT annual return.

21 June
May 2019 monthly BAS due

30 June
Super guarantee contributions due

21 July
June 2019 monthly BAS due 

21 August
July 2019 monthly BAS due

25 August
Quarterly BAS for quarter 4 2018-2019 due