I received notice CP22A saying i owe ~$3K due to "Decrease in credit for tax withheld." The notice gives no detail on why. What do i do? Does my Audit Defense i purchased help me?

Did you amend your return ?    <a rel="nofollow" target="_blank" href="https://www.irs.gov/individuals/understanding-your-cp22a-notice">https://www.irs.gov/individuals/understanding-your-cp22a-notice</a>


If you purchased Audit Defense for your tax return, call Tax Resources, Inc. at (877)-829-9695, or report your notice on their web site at <a rel="nofollow" target="_blank" href="http://intuit.taxaudit.com/">http://intuit.taxaudit.com/</a>. Do not contact the IRS. Let Tax Resources contact them for you.

Yes, i had amended my return though that didn't change the amount of tax withheld.

Contact Audit Defense. Critter#2 gave you the contact information above. They will explain what's going on and handle it for you.