You want to get out of trouble with the IRS .. then perhaps you may want to re-think your responsibilities and how you are handling them. It's really quite simple ... Pay your debts .. they will leave you alone. It's not rocket surgery!
Sorry, not a lot of sympathy for Dead Beat Dads .. or Moms for that matter.
It is actually illegal to cheat or forfeit paying your child support and taxes. You should consider contacting or consulting with any tax advisor or the IRS customer for any information than can actually help you get some tax reprieve.