Who is this calling me is this a scam number for the internal revenue

Just now received a call. It was a recorded message, claiming they were from IRS.

Caller says urgent...officer Julie Smith from IRS. If you don't call back immediately they will take action!

Msg from female computer voice, american accent. Caller says it is the IRS. Time sensitive. Call back before they take legal action. Julie Smith. 415-234-9481

I just received a call this morning. Female recorded message saying she was Officer Julie Smith from the IRS and I should
contact her immediately. These calls need to be stopped. So many people would call back and give personal information to
this person and have their entire life ruined. It is a scam. Please do not call back.