I missed a call from this number.

Left message said they were IRS and coming to arrest me for ???

IRS Scam....Report it: https://www.treasury.gov/tigta/contact_report_scam.shtml

Same message here. All clues point towards scam. IRS will never call leaving messages like that with a busy signal when you call back. They will always send documents in the mail as well

Left a message that the IRS was going to arrest me. good grief. Reported through treasury.gov