21 September
August 2018 monthly BAS / IAS due

30 September
PAYG withholding payment summary due

21 October
Annual PAYG instalment notice (Form N), due

September 2018 monthly activity statement due

28 October
Quarterly activity statement, quarter 1, 2018-19 paper lodgements due

Super guarantee contributions, quarter 1, 2018-19 due

Annual activity statement for TFN withholding for closely held trusts due

31 October
Tax returns for all entities if one or more prior year returns were outstanding as at 30 June 2018.

21 November
October 2019 monthly BAS / IAS due

25 November
Quarterly activity statement, quarter 1, 2018–19 due

28 November
Due date for lodging Superannuation guarantee charge statement – quarterly and paying the super guarantee charge for quarter 1, 2018–19, if the employer did not pay enough contributions on time.

1 December
Income tax for taxable large/medium taxpayers, companies and super funds due

Income tax for the taxable head company of a consolidated group with a member deemed to be a large/medium taxpayer in the latest year lodged due

21 December
November 2018 monthly BAS / IAS due