The IRS says if you get a phone call from someone claiming to be from the agency, demanding money, it's a scam.
Here's what it sounds like when someone tries to swindle you over the phone by posing as an IRS agent. This was recorded by a victim.
"You have to wire this money to the IRS. And for that you need this cash, $2,400 cash in hand with you. So can you tell me, do you have the cash with you? Or you have to go to your bank for that?"
David Tucker is actually with the IRS. He says if the agency is trying to reach you, they'll do it by letter through the U.S. Postal Service.
"We never call to demand immediate payment," says Tucker. "Also we don't require that there be a specific payment method in order for you to pay for your tax liability."
Tucker says scams happen year round, but they pick up during tax season.
The Treasury Inspector General for Tax Administration says nearly 5,000 victims have collectively paid more than $23 million as a result of scams.