BEWARE!  

This is one of MANY numbers for YMax Communications Corporation

I Googled YMax Communications, and they are the #1 worst source of SCAM complaints on the ComplaintsBoard.Com website.

According to many of the complaints posted, they lie about everything to get you to give them money (like saying that you've been named in a lawsuit, or claiming that they represent the IRS, or offering ‘Free Government Grant money’ to recently-arrived foreigners, etc).  

One complainer said the people they spoke with at YMax had heavy Indian or Pakistani accents, so they might be based beyond the reach of American laws and have the phone calls transferred to them.

Based solely on my web research (and not on any personal experience), this is probably the worst telephone scamming operation I've ever learned about...

This is not a legitimate call from the IRS.

Please see the following press releases:
http://www.irs.gov/uac/Newsroom/IRS-Warns-of-Pervasive-Telephone-Scam
http://www.irs.gov/uac/Newsroom/IRS-Reiterate ... -Telephone-Scam

Since this individual is impersonating the IRS you should also report it to the Treasury Inspector General for Tax Administration (TIGTA). You can send an email to Complaints@tigta.treas.gov or file an online complaint by completing their "Online Form" located on their website, http://www.treasury.gov/tigta/contact_report_scam.shtml

Please visit our "Report Phishing" website (http://www.irs.gov/uac/Report-Phishing) and click on "Complaint Assistant". This will allow you to file a complaint with the FTC and identify the complaint as an IRS complaint.

Alternatively you can file a complaint directly with the FTC by visiting http://www.ftccomplaintassistant.gov.

Whether you use the IRS link or file the complaint directly with the FTC, add "IRS Hostile Call" in the Comments section of the complaint.

Individuals who have been victimized by this scam and have provided one or more Green Dot MoneyPak numbers to the scammer should also notify Green Dot directly at 800-473-3636 to report the scam and open an investigation.

Regards,

phishing@irs.gov
Online Fraud Detection and Prevention (OFDP)
Internal Revenue Service
United States Department of the Treasury