If you owe back taxes to the IRS, some amount of panic is understandable. After all, the Internal Revenue Service has the power of the federal government in its corner, something no other debt collector can claim. They are considered the most brutal collection agency on the planet.
It is easy to freeze up and just do nothing when you owe back taxes to the IRS, but hiding from, or doing nothing about your tax debt will not make it go away. In fact, ignoring the taxes you owe will only make the situation worse, since interest and penalties can really add up. You also risk having your paycheck garnished (the IRS does need a court order to do this) or your bank account levied. The IRS can also file a Notice of Federal Tax Lien making it all but impossible to obtain financing for a car or home.