The Free Application for Federal Student Aid (FAFSA) is used to determine eligibility for federal, state, and school aid. It is highly suggested to fill out the FAFSA as soon as possible so you don't miss out on aid. The FAFSA becomes available in October. For more information about the FAFSA, visit https://studentaid.ed.gov/fafsa.
Check out this video series regarding the process of filling out the FAFSA: