The online product can only be used to file a 2016 tax return. TurboTax has no products available now to file a 2011 tax return. The oldest return that could be filed with TurboTax is 2013.
To file a 2011 return you would either have to find a paid professional with 2011 software or a tax preparation volunteer site that still has software that old.
Your other alternative is to download the forms from the IRS web site and complete them by hand: http://www.irs.gov/app/picklist/list/priorFormPublication.html?value=1040&criteria=formNumber&submit...
