Just go to the website and click the Fill Out the FAFSA button on the home page.
I have a brother that also needs to fill his FAFSA form, is there a way to reuse some of our common info from my form to his?
Yes. At the end of the submitting process, you'll get a confirmation page and there you'll see an option for the parent information in your FAFSA form that you can use to transfer this information automatically into another student's application.
So we can also use an app?