Your mother is not obligated to fill out the FAFSA, regardless of whether the government considers you a dependent or not. At 22, you're an adult, and ought not count on your mother's income or help in securing financial aid.

What you do in this situation is meet with a Financial Aid Officer at your college to sort out what other aid you might be eligible for - including scholarships and work-study programs.

And you go find a job that will be willing to work around your class schedule.