Just because a caller identifies himself as a Nigerian prince, doesn't mean that he is one. (However, the time zone difference might be a hint about where he's calling from.)

Just because a caller identifies herself as an IRS agent who will come arrest you for tax fraud unless you proceed immediately to WalMart and buy iTunes gift cards, doesn't mean that's who she is.  

Just because the caller ID says Intuit, doesn't mean that's who called.  It's easy to counterfeit those names and numbers.  

Many of our problems today arise from gullible people being too quick to believe anything they are told.  You have probably had to tell clients that the Internet rumors they have heard about tax deductions are not true.  Be sure to practice skepticism, in your own life.