This is how is works in Australia. The Australian Tax Office will pre-fill your tax return online with income from your wages, interests, managed fund distributions, dividends etc. That maybe enough for simple tax returns, you can just accept their values and submit.
What they don't know is your income from sources like rental income or crypto. They also don't know deductions you are going to claim. In this case you will have to provide the details. Still free to lodge your returns online.
What they don't know is your income from sources like rental income or crypto. They also don't know deductions you are going to claim. In this case you will have to provide the details. Still free to lodge your returns online.