Describe your qualifying person.
Two common situations:
1. You are the non custodial parent and are claiming your child as a dependent, this year. That child is not a qualifying person for HoH, because he/she does not live with you enough.
2. You claim your girlfriend as a dependent. She is not a qualifying person for HoH, because she is not related
Otherwise, you have, most likely, answered something wrong in the interview.
