A computer generated voice message was just left on my phone saying that they are the IRS and I was going to be arrested. The phone number is 1-253-244-9925. Here is the information of the IRS Warning of Pervasive Telephone Scam in 2017: https://www.irs.gov/uac/newsroom/irs-warns-of-pervasive-telephone-scam
They recommend to file a Federal Trade Commission complaint if it happens to you. You can do that here: FTC Complaint Assistant: https://www.ftccomplaintassistant.gov/Information?OrgCode=IRS#crnt&panel1-1