Dependent students must report their parents information, as well as their own, on the Free Application for Federal Student Aid (FAFSA) form. 
Find out who counts as your parent when you file your FAFSA form. If you are considered a dependent student for FAFSA purposes , you will need to provide information about your legal parent on the application. A legal parent is your biological or adoptive parent, or your legal parent as determined by the state for example, if the parent is listed on your birth certificate. If you have a stepparent currently married to your legal parent , you generally also must provide information about him or her. View text-only version 

Who is my parent according to the FAFSA form? 
If you need to report parent information , here are some guidelines to help you : If your legal parents your biological and/or adoptive parents, or parents as determined by the state [e.g., a parent listed on your birth certificate] are married to each other, answer the questions about both of them, regardless of whether your parents are of the same or opposite sex. If your legal parents are not married to each other and live together , answer the questions about both of them, regardless of whether your parents are of the same or opposite sex. If your legal parent is widowed or was never married , answer the questions about that parent. 

What if my parents are divorced or separated? 
In this case , how you fill out the FAFSA form depends on whether your parents live together or not. Keep the following in mind as you read this section : For FAFSA purposes , your married parents are separated if they are considered legally separated by a state, or if they are legally married but have chosen to live separate lives, including living in separate households, as though they were not married. When two married persons live as a married couple but are separated by physical distance or have separate households , they are considered married for FAFSA purposes. 

Divorce

user: Do you know what information is needed for the parents' section of the FAFSA form?

assistant: Do you mean questions that ask for each parent?

user: yes

assistant: Just the basic information about your parent's identity, like their name, date of birth, and social security number; their living situation, marital status, state of residence, household size, and financial circumstances.

user: How should I respond if they are separated?

assistant:  That would depend on if your parents live together or not. If your parents are married but are considered legally separated by a state, or if they legally married but have chosen to live separate lives then they are considered separate, as if they weren't married.

user: What if my parents don't want to provide the required information for the FAFSA form, can I submit it without that info?

assistant: You could, but take into consideration that you would not receive an EFC and some state-school-based aid programs look at the EFC to determine your eligibility for their funds, if you don't have an EFC then you won't be eligible for those aid programs.

user: And what if my parents live in one of the Freely Associated States?

assistant: Ask them to enter the Amount of Wages Earned from their Freely Associated States tax form in the field where the FAFSA form asks for adjusted gross income.