The IRS has a number of "hotline" or toll-free numbers that people can call, depending on the question. The number for the IRS tax help line, as of 2014, is 1-800-829-1040. The refund hot line, which is available 24/7, can be reached at 1-800-829-1954.
For anyone who prepares taxes, practitioner priority service information can be accessed at 1-866-860-4259. Tax practitioners who are working on tax returns online can contact the e-Help desk at 1-866-255-0654. Most of the numbers can be reached Monday through Friday from 7:00 a.m. to 7:00 p.m. according to the IRS website. A National Taxpayer Advocate number is available during those times at 1-877-777-4778.
Anyone wishing to report tax fraud can call the tax fraud hotline at 1-800-829-0433 to listen to a recorded message on to how to submit a report.