Get your taxes done using TurboTax

I still cannot e- file my tax forms.  I am caught in a loop.  TT wants me to put in a number from my 2015 1040, 5b that is different from the number I actually submitted and is accurate.  2015 was a different year from other years' income due to an inheritance.  How can I put in a number that is contradictory to what I reported on my 2015 form.  I am losing faith in TT really fast.