Anonymous wrote:OP, there are no debtors' prisons anymore, and I highly doubt your parents can be forced to pay for their grown son.
Worst case (I think) is that you are garnished for any wages and forfeit any tax returns, and you have to pay back steadily and surely. That's not a blow to your parents. It may be a huge blow to your ego, but that is pride, not fear.
NP here and while that is true I'm really surprised OP can owe so much in back taxes and not be criminally prosecuted. It's one thing to make an error and owe the IRS a few grand. To have the amount of tax debt OP does it seems hard to imagine there was not a willful component to it.