Always get the FULL name of anyone you speak to at the IRS.
I had to call several times a couple years ago, when they claimed that we owed an additional $250,000 in taxes, and each time I called, I spoke with different women, all of whom identified themselves as “Mrs. Knox”. I believe they do not give their actual names out when you talk to them on the phone.
Doesn't work, I tried that. They will give you a false name anyway and if you ask to speak to their “supervisor” they will give you a coworker who surprisingly sides with what the first one said so asking for a name is useless.
Trying to get any solid information from the IRS is usually a waste of your time. They themselves do no know the laws they are supposedly following. Many of them are idiots affirmative action workers.
And their location; you may want to pay them a visit later...