From the title, I assumed this was some neat third-party tool. It didn't occur to me that they would be talking about the official tool. I had no idea that barely a third of people used it. I just assumed that's how most people would do it. It's how I've always done it, and until this year (thanks to having done a few more complicated tax things like selling loads of shares and paying off HECS early) I had never even considered doing it any other way. It's literally free and simple as.

I lived in NZ for a while, it was heaps better over there you don't need to do anything, they just send you a refund or bill, then if you have any other deductions you can claim those. Great for forgetful/lazy people like me.

Completely unrelated, I somehow forgot to file last year so need to do two now

Can I do that through ATO or do I need an agent?