Was a 2018 or 2019 return filed?  With what address?  If a refund, was it a direct deposit?

IRS made up out of thin air some FAQ that incarcerated citizens don't qualify.  That will be challenged in court, and they will probably lose.  Might take a while,  Claiming it on 2020 return might be faster.  

As I told my 80-year-old client who just got her $1,200 check in the mail last week:  I know IRS said it would be deposited directly to the same account where your Social Security goes.  But I also know they lie a lot.