I was incarcerated from November 2009 to January 2020, and obviously did not nor could not file taxes for those years, so how and what do I file?

I'm self employed, but unable to work because of COVID. I haven't filed taxes since 2008, so I'm clueless. I'm trying to receive approval for the stimulus but my 'non-filers' is rejected because I don't have a tax payers pin number.