If you get a phone call from someone who says they work for a government agency, bank, collection agency, medical clinic billing department or other organization and they are asking you for personal information, you should be somewhat wary.
They may not be who they say they are.
The IRS, for example, does not request financial details or information over the telephone.
If you get a call from someone who says they work with the IRS, unless you are having a specific case or ongoing relationship with them, that caller is not from the IRS.
The IRS still works via old-fashioned mail to deliver their notices and other information.
If you are on the phone with someone you don’t trust and they are asking for personal information, especially if they are aggressive with you, you can always ask for their phone number and say you’ll call them back.
It’s possible that the caller is legitimate, but you need to be cautious.
If the caller is legitimate, they won’t mind your cautiousness either. They’ll understand.