Fill it out for both school codes. You haven't got a lot of time to fix it if you do get in, and the financial aid people don't talk to the admissions people anyway. Even if they did, no one will judge that as negative.
The school may have a separate application and other requirements. For example, I had to do an online training session that provided more details about the entire financial aid process. Also, you need to provide your tax return or signed statement saying that you did not file.