Told me they were from the IRS...Wanted their money now or else......I hung up...This was the second call in 2 days.....

Final notice that the IRS is bringing a lawsuit against me. Two calls in one day.

Called and left an electronic voicemail saying it was the "final notice" that the IRS is bringing a lawsuit against me. Riiiight. Deleted!

I got two messages from this saying the IRS is bringing a lawsuit against me. I called it back on the weekend and got a recording saying the person is not receiving messages, then a hangup.

There is a widespread IRS (or CRA) or "tax scam" being  practiced by scammers on both USA and Canadian residents.

USA tax payers, click on the "USA Information" button, below, for lots of information and a reporting site.

[spoiler=USA Information]

USA tax payers should read this:
http://www.irs.gov/uac/Newsroom/Phone-Scams-C ... 5-Filing-Season

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

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

Recent news story:
http://www.wltx.com/story/money/2015/03/12/fa ... -scam/70202814/

Congressional hearing:
http://www.nbcnews.com/business/taxes/tax-imp ... hearing-n341906
[/spoiler]

Canadian tax payers should read this:
http://www.cra-arc.gc.ca/nwsrm/lrts/2013/l131210-eng.html

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