Have you saved a duplicate copy of the file and attempted to create the amended return?  If you do, when you check the box in Part IV, does it change anything?  Does the amended return show a difference between what was originally filed and what the amendment is within the "Net Change" Column?  I assume it does not since no figures have changed, but I'm curious. 

The lawyer must feel it is important to show the taxpayer was a resident for more than half the year.   Enter an explanation in Part II and file it.