OK so what I recall is that you must scroll through all pages beginning with page 2. At the tops of the pages and dispersed throughout are check boxes that ask if you have something that needs reporting on Sch O. If you have that box checked anywhere in Proseries, it will require an entry on Sch O. You might be able to work backwards from the Sch O to figure out where the checkbox is that needs to be unchecked. If not, you must check every reference to Sch O in the return.