This is a user to user forum. You can probably get help from this forum by providing more detail on what the IRS notice says.
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 http://intuit.taxaudit.com/. Do not contact the IRS. Let Tax Resources contact them for you.
If you did not purchase Audit Defense, start by downloading and running the Audit Support Center at the following link.
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Also see the following link on the IRS web site for more help.