Click here for a list of deductions you can claim:
https://www.ato.gov.au/Individuals/Income-and-deductions/Deductions-you-can-claim/
Click here for ATO advice on record keeping:
https://www.ato.gov.au/individuals/income-and-deductions/in-detail/keeping-your-tax-records/
Click here to read about who the ATO is targeting in 2018:
https://www.acuitymag.com/finance/atos-2018-hit-list-targets-smaller-tax-avoiders