The new IRS Dirty Dozen of tax scams and rip-offs covers a lot of ground. Some warnings are about familiar faces, such as ghost preparers who don’t sign returns, while other scams involve devices from simple robocalls to sophisticated financial arrangements.

And what a busy year to be a crook when it came to tax info! During 2020, almost 400 “vishing” or “voice phishing” scams were reported, for instance, up 14 percent from the prior year, and tax lien-related scams nearly doubled. (Reports of IRS impersonators on the phone, on the other hand, did decline.)

Here are 12 of last year’s dirtiest, according to the IRS.

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