Most people pay tax during the year and then when the financial year ends, they do their tax return and get a refund.
But it is possible for you to pay less tax during the year instead.
That means, you keep more money in your pocket every week.
This is very common.
It is called a PAYG Tax Variation because you are varying the tax you pay.
It is something smart investors do.
You can do it online:
Or your accountant can sort it out.