I've just inputted my 25 trades completed last financial year into e-tax; it took an hour or so - bearing in mind I had to get my head around the software as it's my first trading year. A little boring, but I'm offshore so the blessing is being able to do your own tax and submitting remotely.
I wonder, am I kidding myself - is it worth the trouble? Or am I doing it incorrectly?
if you have traded 25 times during the year then the ATO will probably regard you as being "in the business of" a share trader, which would mean that your gains are regarded as income gains ( from the business of share trading) and not capital gains. and you would add them on top of your normal income and pay tax on them.
So your probably better off speaking to an accountant to lodge this for you, rather than making lots of errors doing it yourself.
good luck