CSS Profile Separated Parents

I have been having a bit of trouble filling out the CSS Profile. My parents have been separated for over a year (they live in different houses), but they still share everything financially. They have a joint bank account, the house is in both of their names, and my dad still pays for everything. Financially, their situation is identical to that of when they were married, aside from my dad’s extra rental bill. I don’t live with either parents, but my 4 sisters live with my mom. However, my dad pays for everything for them (food, mortgage, etc). How do I fill out the CSS Profile?

Sounds like dad would be the “custodial parent” since he has the higher income (since he pays for everything). And your mom would be the NCP.