Hi WIT,

Thanks for posting in the Community! I can see that you've posted a similar query about non-deductible or non-allowable expenses in a different conversation. With this, I'd recommend visiting the said thread through this link for further details. 

Also, you can check this QuickBooks Blog for your reference: Guide to Tax Deductions in Australia. 
 

Feel free to post again if you have any other questions. Have a nice day!