Have you ever tried to use ProSeries Professional to file a superseded return?  I tried for the first time this past season.  It's an involved process making a copy of the return to preserve the original tax return.   The ProSeries support staff are not familiar with the process.  The worse part was that the IRS accepted the superseded return electronically, but the IRS then processed the original return and issued the incorrect refund within a week.  It was not possible to file a superseded state of CT return.  Instead, I had to file an amended state of CT return.  Not worth the effort.