I came to USA in the last months in 2021 , so can i do tax for 2020 now ? because I'm trying to make application for FASFA and they ask me about tax2020?

In 2020, she was living at home outside America, and I came to America in 2021 at the end of the months and started working.. but I was not here in 2020. Can I file for the 2020 tax?  In the application to apply to FASFA, they ask about the year 2020, so I do not know what I should answer, will it file or not filed?