If you have a stepparent who is married to the legal parent whose information you’re reporting, you must provide information about that stepparent as well.
EXCEPTION: The FAFSA form asks about your parents’ education level. For these two questions, your parents are considered to be your birth parents or adoptive parents—your stepparent is not your parent in these questions.
Including your stepparent’s information on the FAFSA form helps create an accurate picture of your family’s total financial strength.