You may owe money to the ATO if you:
- are an employee and you haven’t had enough tax withheld from your pay by your employer or had more than 1 job during the financial year
- are a sole trader and haven’t paid tax in advance to the ATO during the financial year
- received other streams of income where tax was not withheld such as sharing economy jobs/investments (Capital gain, Oversea income, Investment income or income from Uber, Ola, Deliveroo, Uber Eats, Door Dash, Di Di etc)