12 July 2013 at 20:11
Thanks for the compliment!
You can request a correction and resubmit your return on eFiling by clicking the "request correction" button below the ITR12 where you did your return. There you can change your return to the correct information.
Just check that the tax years are correct. A tax year runs from 1 March to 28 February. So for 2011 the tax year would be 1 March 2010 to 28 February 2011.