I have a C-Corp with 1 LLC subsidiary, all activity is in the LLC, no activity in the parent corp. Do I have to file a consolidated 1120 or can I treat the LLC as a disregarded entity and report on Schedule K line 5a?  ProConnect Tax Online doesn't allow me to include Form 851 to list out the entity so I'm trying to figure out the correct way to report it so I can figure out if I need new software.  Thanks!