What is the federal tax department phone number? The customer support phone number of Federal Income Tax is (800) 829-1040 (Click phone number to call).How do you contact the irs by telephone? The telephone numbers through which to conduct the IRS include 1-800-829-3676 and 1-800-829-1040. While the former is handy when in need of tax forms, publications and instructions, the latter is applicable when asking tax questions.Does the irs contact taxpayers by telephone? IRS does contact taxpayers by telephone when an account is delinquent and the case is being processed by their Automated Collection System. And, occasionally Revenue Agents will contact a taxpayer directly when they initiate an examination of a complex inpidual or business return.When is best time to call irs? Be aware, the IRS offices are located all around the country. The best time to call is either early -- like 8 am/5 am Eastern/Pacific, or late -- like 7 pm Eastern/4 pm Pacific. #3 Be polite. Most of the representatives deal with people who want to yell at them all day.
(877) 829-5500 Federal State Local Employment Tax (FSLET) Customer Services Depending on the nature of your request, please use one of the following methods to contact us. Customer Account Services You can call toll-free at (877) 829-5500 with questions concerning the following as they relate to government entities: Account-related questions.