Caltech EA CSS Profile Deadline

The deadline to submit the CSS profile for applicants applying to Caltech early is November 15th. This is earlier than any of my other schools, and it seems unreasonably early. I don’t even think my parents are done with their tax returns for 2015. Why is it so early, and is it really necessary to submit by this deadline?

You don’t need to have your 2015 taxes done. Just estimate based on a prior year.