After you file

Yes, the feds accepted the second amended return within minutes.

 

The state of NC eventually accepted theirs, but I had to hand edit it and lose $2 in the process.  This amendment reduced the amount I owed the state and this caused a recalculation of the interest penalty so there was a line that said I owed them minus two bucks.  Negative numbers aren't allowed. I zeroed this to get it past their filter.