I got divorced in 2009 and did not know that we had a large NOL carry forward from 2007. It was not on our 2009 tax return. I saw my ex-husbands tax return for 2012 and the NOL was listed. My ex must have amended the past tax return. What can I do at this point, is it too late to amend my 2007 tax return even though I was not aware of the NOL? Thank you for your help