IR-2018-103, April 24, 2018 — The IRS today warned of a new twist on an old phone scam as criminals use telephone numbers that mimic IRS Taxpayer Assistance Centers to trick taxpayers into paying non-existent tax bills.

Source: IRS, Security Summit Partners warn of new twist on phone scam; crooks direct taxpayers to IRS.gov to “verify” calls | Internal Revenue Service

Happened to me May 25, 2018!