Yes, you should call back immediately with your pertinent details, confirm your SSN#, Bank Accounts (For Garnishment),
and Date of Birth. That is the only way you may stave off the IRS from attacking you.
I got a call from the number 415-944-2722 and started laughing and the man got mad at me and hung the phone up. He was trying to get information from me that I would not give out. I called the number right back after he hung up on me and it is now busy.