Hi.
I did this process many times. After your reply, I did it again, more slowly in case I missed anything. Still, schedule 8812, like your screenshot, is no where to be found. I go through that whole section, which is only 3 questions - none of which ask about the principle abode. It just says, "congrats, you get a child tax credit." and then moves on to the next section. I'd love to know how to access the schedules, particularly the 8812.
