Many taxpayers have encountered individuals impersonating IRS officials – in person, over the telephone and via email. Don’t get scammed. We want you to understand how and when the IRS contacts taxpayers and help you determine whether a contact you may have received is truly from an IRS employee.
The IRS initiates most contacts through regular mail delivered by the United States Postal Service.
However, there are special circumstances in which the IRS will call or come to a home or business, such as when a taxpayer has an overdue tax bill, to secure a delinquent tax return or a delinquent employment tax payment, or to tour a business as part of an audit or during criminal investigations.
To understand how and when the IRS contacts taxpayers and determine if it’s truly the IRS see: How to know it’s really the IRS calling or knocking on your door.
this article is courtesy of the IRS.gov