21 September 2023
- Lodge and pay August 2023 monthly business activity statements.
30 September 2023
- Lodge PAYG withholding payment summary annual report if prepared by a BAS agent or tax agent excluding large withholders whose annual withholding is greater than $1 million.
21 October 2023
- Lodge and pay quarter 1, 2023–24 PAYG instalment activity statement for head companies of consolidated groups.
- Lodge and pay September 2023 monthly business activity statement.
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.