| March | |
| 21 | ACT | Activity Statements |
| February 2010 monthly activity statements: final date for lodgment and payment. |
| April | |
| 21 | ACT | Activity Statements |
| March 2010 monthly activity statements: final date for lodgment and payment. |
| 28 | ACT | Activity Statements |
| Quarter 3 (January - March 2010) activity statements: final date for lodgment and payment. |
| 28 | PAY | PAYG instalments |
| Quarter 3 (January - March 2010) instalment notices – forms R and T. Final date for payment and, if varying the instalment amount, lodgment (two-instalment payers are required to pay 75% of instalment liability by this date). |
| 28 | GST | GST instalments |
| Quarter 3 (January - March 2010) instalment notices – forms S and T. Final date for payment and, if varying the instalment amount, lodgment (two-instalment payers are required to pay 75% of instalment liability by this date). |
| May | |
