How is the ownership reported in Form 1120. Company A is incorporated in a foreign country.  And the Company B was registered as C corp in Delaware. Now, B owns 100% of A, more likely B is a holding company of A. How is this shown in 1120? What schedules do I need to fill out. Since A is 100% owned by B, does it mean I need to fill out 5471 too? Also, do I also need to consolidate their income?