Forget birthdays, anniversaries and Christmas. Instead, punctuate your diary with a list of QuickBooks deadlines relevant to your Australian business. Here are some important ones to start out with:

Payment or report Due Date
Business Activity Statements Monthly payments: 21 days after the end of each month
Quarterly payments: 28 days after the end of each quarter (except for the December quarter, where the deadline is 28 February)
Payment summaries 14 July
Annual withholding declaration 14 August
Superannuation 28 days after the end of each month or quarter, depending on the superannuation fund
PAYG withholding tax Monthly payments: 21 days after the end of the month
Quarterly payments: 28 days after the end of the quarter