they are calling posing as the IRS stating that you owe money for back taxes

I got a call from this number this morning 1/30/2015.    He posed me as an IRS officer and asked me to pay fine or they will arrest immediately.   He is fraud.    Please care full this guy and number.   I told him I will pay fine only at  IRS office personnely.  Not to accounts.  He cut my phone line.

PERSON CALLED ME STATING HE IS FROM IRS AND TELLING ME THAT I OWE MONEY TO IRS SAYING THAT I OWE $ 3000 AND IF I DONT PAY I WILL END UP IN JAIL FOR 5 YEARS.WHEN I TOLD HIM I NEED ALL THIS WRITTEN HE SAID HE WILL MAKE SURE I END UP IN JAIL AND FOR 5 YEARS AND HANG UP ON ME

called on 02.02.15, morning, left a message to call this hot line ,it is very urgent, call before IRS takes any action against you.

There is a widespread IRS or "tax scam" being  practiced by scammers on both Canadian and USA residents.
USA tax payers should read this:
http://www.irs.gov/uac/Newsroom/IRS-Reiterate ... -Telephone-Scam

Short answer:
The IRS never initiates a contact via phone.
They always send a snailmail first.

Educational post:
This scam is also described as scam #11, here:
http://phonehelp.2truth.com/facts_rev.html

If you were contacted by an IRS impostor, you may file a report, after clicking on this link:
http://www.treasury.gov/tigta/contact_report_scam.shtml