I was looking at what TurboTax does with the information, and I see entries for those over 3 going at the end on a sheet called "Schedule E, page 2 Line 28 Information" and another sheet called "Schedule E, page 2 Line 28 Income or Loss." Each entry line is preceded with a letter.. D, E, etc... These sheets are placed at the very end of the printed return.
I was just curious, what to they use after Z? Do they go to AA, AB, etc as they would in a spreadsheet, or what? At first I was wondering if they were using single-character designators and running out of characters-- leading to a limit. But that seems unlikely. Now I am wondering if any limit is related to getting those each of those continuations for schedule E onto a single sheet.