Create your FSA ID: https://studentaid.gov/
Helpful one page document on how to complete FAFSA
Students should create an FSA ID before starting their FAFSA. Make sure students write down their login information; they're notorious for losing login details. If parents have SSN, instruct student's parent (or the student on their behalf) to create an FSA ID. If parents do not have SSN, they will submit signature page by mail.
Use this handy checklist to see what information you will need to have to complete your financial aid application.