21 March
February 2018 monthly BAS due
31 March
Tax return for companies and super funds with total income in excess of $2 million in the latest year lodged due
21 April
Quarterly PAYG instalment activity statement due, quarter 3, 2017–18 for head companies of consolidated groups
March 2018 monthly BAS due
28 April
Make super guarantee contributions for quarter 3, 2017–18 to funds
21 May
April 2018 monthly BAS due
26 May
Quarterly BAS for quarter 3, 2017-18 due
28 May
Pay FBT annual return.