Total scam.  Originates in either India or Pakistan.   Block and ignore.   DO NOT RETURN THE CALL!
See:  http://www.irs.gov/uac/Newsroom/IRS-Reiterate ... -Telephone-Scam

Report them:
http://www.treasury.gov/tigta/contact_report_scam_ok.shtml

I’m an Enrolled Agent with the IRS (Inactive). IRS does not initiate contacts by phone.  US mail only.   IRS does not file lawsuits.   Court action, if any is handled by the DOJ and all parties are entitled to legal assistance if it is a criminal matter.  But--tax disputes are for the most part civil matters.  90% of all IRS tax disputes are settled administratively.  IRS has absolutely no authority to call on local law enforcement for anything. Local law is never involved in IRS tax disputes. IRS does not threaten to involve local law enforcement or to arrest you for nonpayment of federal taxes.  IRS has no powers of arrest.    If LE is necessary, US Marshals do the job.  IRS does not cold call anyone and demand immediate payment of  money.  IRS does not ask for financial information over the phone.   IRS does not accept Green card money paks for payment in any case.  No one is prosecuted for ordinary tax disputes. IRS has absolutely no authority over anyone's professional license. Professional licensing is handled by state governments.  Yes, levies on property to satisfy an existing tax obligation do occur, but only after a very long period of negotiation. And yes, liens are placed on individuals but  usually after a lot of negotiation and a failure to reach a settlement.    All determinations of tax liability are subject to appeals.  All  contacts by the IRS are initiated by US mail.
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Received a call indicating that this was our last notice; IRS was filing a law suit against us and we needed to contact them immediately at 206-201-2156.  the call did not use our name nor did they leave a case number. This scam has been broadcasted over the News.  News reports have indicated that IRS does not contact anyone over the phone; they correspond via mail only.

Received telephone call from 206-201-2156 on home telephone Friday 9/11/2015. Don’t use home telephone, so retrieved message on Friday, 9/18/2015. IRS getting ready to file lawsuit due to Final Notice. Called # back. Put in voicemail with no identification. Left message stating I received call stating IRS was filing lawsuit and provided home #. SCAM!!! Funny, area cod 206 IS Washington, just not DC – Seattle. As a Bookkeeper who had dealt with tax issues over many years, please remember that the IRS WILL NEVER CALL OR MAIL YOU.

Meant EMAIL you. In my anger, my prior post said MAIL. The IRS will MAIL you, not EMAIL you.

It's scam still at it