April 24, 2020
When divorced parents share custody, students are usually advised to list on the FAFSA the name of the parent with whom they reside 51% of the time or more. If the child moves back and forth and lives with each parent pretty evenly, then of course he or she should name the “poorer" parent on the FAFSA because financial aid assessments will be based on that parent's income. (For colleges that require the CSS PROFILE or other institution-specific forms, then both parents' income is usually considered so it doesn't matter where the student claims to live.)
Although you risk some good karma by stating on your FAFSA form that you're domiciled with Mom, it makes sense to maintain that address on your college materials. Presumably you are not changing high schools, and your father lives within a reasonable distance. College folks are apt to raise eyebrows when a student uses the address of a parent whose house is a plane ride away from homeroom ... or even a lengthy commute by car.
Although “The Dean" doesn't promote dishonesty on college documents, I've seen a lot of students in your shoes over the eons who bounce back and forth between parents. So it seems entirely plausible that, if you tell the colleges that you live mainly with your mom, by the time the ink is dry on your applications, perhaps you will.