Are you saying the 1120 has already been filed and it should have been a 1120S? You now want to convert that 1120 file to a 1120S file, so it can be filed correctly? 

Yes, I do not want to redo the return, I am familiar with Ultratax which allows to convert the information into the correct entity.

Can this be done on this software.

Sorry for the late response.

Here is an old discussion that basically says NO. Since they are two quite different file structures, the conversion is sloppy at best. Probably easiest to bite the bullet and just repeat the input fresh. https://proconnect.intuit.com/community/proconnect-tax-discussions/discussion/how-can-i-convert-a-c-...