I need some help because my NOL happened in 2009 and hasn't been used up yet. Problem is that I filed Single in 2010 and 2011 but got married and filing MFJ for 2012. Pub 536 says I have to separate the NOL out and only use it on my own income. Prob is we both have SE income and I had a small W-2. Putting it on Line 21 takes both amounts from both people and reduces them (still to a negative amount for total income though). How do I physically separate the NOL out so it only affects "my" income?