IRS officials do not call delinquent taxpayers. They communicate with them via mail. If taxes are owed, they will work out payment arrangements. Authorities say any demand for immediate payment via wire transfer or prepaid debit card is a red flag for a scam, as such funds cannot be traced or recovered. If you get a call demanding immediate payment, hang up. If you believe you may owe money, contact the IRS directly to verify the debt and make payment arrangements.