It's a problem that seems to be popping up more and more this tax season.  For the one I had, I left the former shareholder's K-1 in the software with zero percent ownership.  If you catch it early you could make a copy of the prior year return, delete the former shareholders, adjust the percentage of current shareholders and re-transfer the return.  But that is a lot of extra work if you have the current year return basically done already.

@IntuitGabi  since there have been a number of posts about this issue this year, is this on anybody's radar at ProSeries?