It is. Whereas you have your real parents or you being adopted, that information is required. But, as said before, there are special circumstances that avoid entirely this requirement.
Also, I need to find out Order of schools on your list. Can I change my choice of schools that I proposed on my FAFSA form?
You will find all the information you need on the website section https://sctuitiongrants.org/faq/
Are there any implications for changing my list of school choices on my FAFSA form when applying for Grant aid awards?