If you want to apply for institutional financtial aid (ex. grants, Perkins loans), you need to include your parents' info. At my school, most people are eligible for grant money ( I got $6000 a year). Now that the Stafford loans are going to be set at a fixed rate of 6.8%, I'm sure the Perkins loans are going to become very popular (fixed rate of 6%, subsidized, longer grace period after you graduate). Putting your parents info won't affect how much you are offerred in Stafford loans, so I would say to go ahead and include it on your FAFSA.