Several law enforcement agencies, including the IRS, are once again warning the public about scammers who are becoming much more sophisticated.

The latest one features a common mailed notice IRS sends to taxpayers if there is a difference in what appears on your tax return and information IRS has received from other parties about your income and other tax situations.  The IRS internally calls these “CP-2000” notices.

A new wave of fake letters are being mailed to people.  The scary part of this is how good the scammers have become at making the mailed paper notice look very close the the real notices sent out by the IRS.

If you receive a phone call from someone claiming to be from IRS, or received an e-mail or mailed letter from the federal tax agency, call IRS at 800-829-1040.  Congress hasn’t been very generous in staffing IRS the past several years, so you may be waiting on the line for a long time, but it is worth it if you have any reason at all the question a communication from IRS.