He can't file for 2020 because they sent a letter and said there was a problem with 2019 and he can't contact them because he's incarcerated. Can you help?
Your son can receive the Stimulus.
If you are incarcerated you are still eligible for a stimulus payment. Just complete a 2020 federal tax return. You do not need to have income to file that return, it is to get information on where to send the check.
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Use this link: https://freefile.intuit.com/
to file your return for free 🙂 Hope this helps.
Q A7. Does someone who is incarcerated qualify for the payment? (updated October 29, 2020)
A7. Pursuant to a permanent injunction entered in Scholl v. Mnuchin, No. 20-cv-05309 (N.D. Cal. Oct. 14, 2020), appeal docketed, No. 20-17077 (9th Cir.), the IRS cannot deny a payment to someone who is incarcerated if they meet the criteria described above in the response to Q A1. Information can be provided to the IRS by using the Non-Filers: Enter Payment Info here online tool by November 21, 2020. Or, you may mail us a 2019 simplified paper tax return following the procedures at File a Simplified Paper Tax Return by the court-ordered deadline of November 4, 2020. For more information see Q B13. I am currently incarcerated, or I was incarcerated at some point in 2020, and I have not received a Payment. What do I need to do to get a Payment?