I have contact with the IRS about every six months. My taxes are complicated.

This has been a constant thing for about thirty years. Sometime I own them, sometimes they owe me.

I have NEVER received a phone call from them for a simple reason. It is too costly for them to do so. A letter creates a paper trail and this trail is always necessary to resolve a conflict. I am, of course, free to call them.

Sometimes the amounts are large and sometimes they are small. One was for sixty-seven cents.

So any phone call is a scam. Even after you have contacted them by phone they will respond by letter. It is all a part of the necessary paper trail.