| 31 March 2023 |
| Lodge tax return for companies and super funds with total income of more than $2 million in the latest year lodged (excluding large and medium taxpayers), unless the return was due earlier. Lodge tax return for the head company of a consolidated group (excluding large and 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. Lodge tax return for individuals and trusts whose latest return resulted in a tax liability of $20,000 or more, excluding large and medium trusts. |
| 21 April 2023 |
| Lodge and pay quarter 3, 2022–23 PAYG instalment activity statement for head companies of consolidated groups. Lodge and pay March 2023 monthly business activity statement. |
| 28 April 2023 |
| Lodge and pay quarter 3, 2022–23 activity statement if electing to receive and lodge by paper and not an active STP reporter. |
| 30 April 2023 |
| Lodge TFN report for closely held trusts if any beneficiary quoted their TFN to a trustee in quarter 3, 2022–23. |
