<human>: Can you condense the text into three sentences or less?

Hi /r/personalfinance,

To make a long, long story very concise:

A) Dad lost a lot of money during the collapse of 2008-ish, made worse by an expensive medical condition at the time.

B) Lost his job in 2010.

C) Has not been employed since, because he has chronic problems with his back (denied disability, twice) and because he wracked up a significant bunch of taxes he has yet to pay to the IRS. 

D) Because of C), he is irrationally afraid to draw a paycheck or open a bank account.

He successfully filed for bankruptcy a couple years back. Most of his debts were erased, even taxes, but several more claims were made by the IRS after the bankruptcy settled, so he can't simply get rid of them.

I was unable to get an accurate number out of him, but what he owes the IRS is in the neighborhood of $5,000 to $20,000.

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I am currently paying for his housing and groceries. I'm happy to help him out and am grateful that I have a decent enough job to be able to do it... but it is becoming an increasingly large strain on me and my finances. I don't think this is sustainable long-term.

I straight up asked him if he was looking for work anytime soon, because **anything** would help. Part-time, minimum wage, whatever. He responded that it would have to be low-skill, and he'd have to be paid under the table to avoid the taxman.

I love the guy but that's not acceptable.
<bot>: Dad owes a bunch of money to the IRS, fears legal retribution. No other source of income or aid is available to my knowledge. What are some good tools or programs for tax "forgiveness" we can look into?