This number called and I didn't get to it.  I called it back and it has a voicemail stating it is the Internal Revenue Service and to leave your name and number.  The other day I received a call from a man stating he was from the Internal Revenue Service and there was a warrant out for me to be seen in front of the Court of Magistrates of the United States.  When I stated that I doubted this was the IRS, the caller told me to stop being smart.  I hung up on him and blocked the number, but apparently they will try again with a different number

this caller called me stating that he was with the IRS and that i owed money because i filed taxes wrong "on my man" and i told her i doubted it was true and said they did not even know my last name and they hung up on me as soon as i said that.

Woman with a very heavy accent called saying she was with the IRS and said that they had information about someone else using my name. She asked if I had received any previous information about this, gave me a "case number" and transferred me to someone else who put me on hold. I ended the call then.

Just got a call from this number. Was told that I didn't file my taxes correctly from 2010-2014 and that I own 2,000+ dollars and that there is a lawsuit against me. It was a woman with a very heavy accent. It's a scam. I told her that I do not believe her, then hung up! 202-239-1247

There are numerous telephone and email scams in which individuals claim to be employees of the Treasury Department. These scammers often state that they are from the “Department of Legal Affairs,” offer grant money in exchange for you wiring a small payment, or threaten to arrest you within a short period of time unless payment is made. Do not provide personal information or payment to these individuals.  Their actions are crimes under Titles 18 and 31 of the United States Code, and the Treasury Office of Inspector General is working to stop them.

If they claim to be from Treasury, report  it to OIGCounsel@oig.treas.gov with a description.  If it was a phone contact, include:
the exact date and time that you received the call(s)
the phone number of the caller
the geographic location and time zone where you received the call
a description of the communication.

If they claim to be from the Internal Revenue Service (IRS) or it is about taxes, report it to the Treasury Inspector General for Tax Administration at:
https://www.treasury.gov/tigta/contact_report_scam.shtml

https://www.treasury.gov/services/report-fwa/Pages/Report-Email-Scams.aspx