Doesn't Australia do it automatically for most of the people, you just have to check the numbers and if they are correct just submit.
The UK uses the PAYE (Pay as you earn) system whereby the employer withholds tax from your wage on your behalf and pays it to the government automatically. There’s no “pre filled form” to check. It’s just paid already. At the end of each tax year you get a P60 slip telling you how much you earned and paid in total. Sometimes HMRC writes to you tell you oops you paid too much, here’s a refund.
If you have more complex tax affairs you can request to do Self Assessment and fill in a form each year.