The federal deadline is June 30, 2020--over a year away. If you apply by that date, your school must process any federal aid that you may qualify for. However, financial aid packages often include aid from other sources, such as state aid or scholarships from the school's own resources. So, your school or state may have deadlines of their own if you want to be considered for aid from those sources, or if you want aid to be processed in time for a particular semester. You can check with your state's department of higher education to determine their deadline, and with the school you plan to attend to see if they have their own deadlines.