If you receive a pre-recorded message asking you to call back or else you will be issued a warrant for your arrest, ignore it. Do the same if you receive an email from what appears to be the IRS asking for your Social Security number and account information.
Keep in mind that the IRS will not initiate contact with you by email to request personal information. To report an IRS impersonation scam, go to the IRS Impersonation Scam Reporting website.