The Washington Application for State Financial Aid (WASFA) is for people who don't file a federal FAFSA application. People who complete a WASFA are applying for state aid.
A person should complete the WASFA if they are undocumented or do not qualify for federal financial aid because of their immigration status. The WASFA can also be used in limited circumstances by other select applicants who cannot or choose not to file a FAFSA.
People who complete a WASFA only are applying for state aid. If you are eligible for federal aid, you should complete the FAFSA to maximize financial aid awards.