Thank you, @AnnetteB6 . So I checked my Schedule C's "home office summary", it has my first home as the only line there. Then, I went to my "Employee Job Expenses", there is only one home office entry (my second home's address) there. Unless there is another place (which I doubt), it seems to be a bug in Fed to State transfer. I even tried re-importing from Fed to State, same result. Is there a way to edit it manually, I remember I might have done such edit once a while ago?
