1-800-829-1040
Be ready to be on hold a really long time. Additionally, you can expect to be disconnected while on hold, and expect that to happen more than once. It may take you hours, or even days to get an actual human on the line. Keep in mind the IRS is overloaded beyond their ability to deal with the load by about a factor of 10, because of all this pandemic stuff. So patience is a must, not a choice.
