Can anyone help with how I lodge tax with the ato myself for last years financial year (2011-2012)??

I've been looking on ato website buts it's not very helpful! It's says I need to order the instructions from previous years which I've done but when I read them they say you still lodge it online with etax but when I go onto etax it says you can't do previous years. So I'm just going around in circles lol

Obviously I will call them on Monday but would love to get some insight on how it's done. I do not want to pay a tax agent to do it for me as I only paid $12 tax!! Hahaha

Any help would be awesome!!!