Thanks very much for the information, Seaside. My only final thought would be since the 1120S has been E-Filed, but, the return isn't due until Jan. 15, 2019, it would seem I could prepare a "superseding" return as opposed to an Amended 1120S. I've never done one, but, one advantage is that I could just refile [I'm not sure if Proseries will allow me to E-file the corrected return as opposed to mailing in a paper copy] the complete return with "Superseded" written on the top. That way I wouldn't have to send in only certain schedules as part of an Amended 1120S. This return would actually take the place of the original return and be treated as such by the IRS if filed by the original due date [including extensions]. I've never done a "superseding" return. Does my thinking make sense on doing this? Also, Proseries is showing the codes to be used on line 17 of Schedule K for 2018. Would it be advisable to use these letter codes in re-doing the 2017 return or would it be better to just reference the item such as"QBI" and "W-2 wages", for example?