21 October 2023
- September monthly activity statements – final date for lodgement and payment
- Quarter 1 (July – September) PAYG instalment activity statement for head companies of consolidated group
28 October 2023
- Lodge and pay quarter 1, 2023–24 activity statement if electing to receive and lodge by paper and not an active STP reporter. Pay quarter 1, 2023–24 instalment notice (form R, S, or T). Lodge the notice only if you vary the instalment amount.
31 October 2023
- Lodge and pay quarter 1, 2023–24 activity statement if electing to receive and lodge by paper and not an active STP reporter. Pay quarter 1, 2023–24 instalment notice (form R, S, or T). Lodge the notice only if you vary the instalment amount.
- Lodge tax returns for all entities if one or more prior year returns were outstanding as at 30 June 2023.
11 November 2023
- Quarter 1 (July–September) activity statements lodged electronically – final date for lodgment and payment