Received a call from this number claiming to be the US Treasury Department and that I have been accused of tax evasion. Said there was an error on 2009 taxes and I owe back taxes. Tried to confirm my name and address which I did not do. Indicated that within 45 minutes I would be picked up and taken to jail. Claimed I had been informed of this through the mail previously. They have repeatedly called all day about every 30 minutes.

There is a fairly common 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 want to keep a government employee employed to help you, report the scam here:
http://www.treasury.gov/tigta/

Remember to return here, to 800notes.com, after you look at any of the information at that site, either to post more information, or to let us know you avoided the scam, or to read any further information about that number that others may post.