I'm sure it's a scam I just got the same call saying it was time sensitive and they are the CRA. They ask for no one specific and CRA sends letters. If you had an issue with them they would have mailed a letter and if those have failed then they would phone and they would ask for someone specific and have a way of verifying who you are because you can't just talk to some random person on the phone about someone's taxes. It's a breach of the privacy laws I think they just got to the Webers in the national phone directory.
called 2x in one day says you must call immediately or action will be taken against your name...although the call was for no one specific..claims to be CRA.
I received the same call... Except that I always did my income tax in French and I live in the province of Quebec.... So, don't see why I would receive a call in English first of all !