These dates are from the ATO website and do not take into account possible extensions.
You remain responsible for ensuring that the necessary information is with us in time.

BAS/IAS Monthly Lodgement – March Activity Statement: 21st April, 2016 final date for lodgement and payment.

BAS/IAS Monthly Lodgement – April Activity Statement: 21st May, 2016 final date for lodgement and payment.

BAS/IAS Monthly Lodgement – May Activity Statement: 21st June, 2016 final date for lodgement and payment. ________________________________________
3rd Quarter of FY 2016: BAS Lodgement – March Quarter 2016 (including PAYGI) 28th April, 2016 final date for lodgement & payment

4th Quarter of FY 2016: BAS Lodgement – June Quarter 2016 (including PAYGI) 28th July, 2016 final date for lodgement & payment

When a due date falls on a Saturday, Sunday or Public Holiday, you can lodge or pay on the next business day.

A public holiday is a day that is a public holiday for the whole of any state or territory in Australia.

Due date for super guarantee contributions, for:
3rd Quarter of FY 2016, January to March 2016 – contributions to be made to the fund by 28th April, 2016.
4th Quarter of FY 2016, April to June 2016 – contributions to be made to the fund by 28th July, 2016.

The super guarantee charge is not a tax deduction if not paid by these dates.
Super Guarantee Contributions must be paid (to fund) by 30th June to qualify for a tax deduction in the 2015–16 financial year.

Refer to the ATO for details regarding any SGC charges applicable if not paid by due date.