ATO Key Dates

March 2021

21 March

  • Lodge and pay February 2021 monthly business activity statement.

31 March

  • Lodge tax return for companies and super funds with total income of more than $2 million in the latest year lodged (excluding large/medium taxpayers), unless the return was due earlier.

    Payment for companies and super funds in this category is also due by this date.
  • Lodge tax return for the head company of a consolidated group (excluding large/medium), with a member who had a total income in excess of $2 million in their latest year lodged, unless the return was due earlier.

    Payment for companies in this category is also due by this date.
  • Lodge tax return for individuals and trusts whose latest return resulted in a tax liability of $20,000 or more, excluding large/medium trusts.

    Payment for individuals and trusts in this category is due as advised on their notice of assessment.

Mount Gambier Office



233 Commercial Street West
PO Box 246 Mount Gambier SA 5290


Stirling Office



Unit 4/3-5 Mount Barker Road
PO Box 727 Stirling SA 5152


Norwood Office



3 Kensington Road
PO Box 4067 Norwood South SA 5067


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