Contact the IRS

  1. The main IRS website is
  2. Tax information for charities and other nonprofits can be found at:
  3. Here is the number to call the IRS Customer Service for nonprofit organizations: 1-877-829-5500. The best time to call them is about 8:35 a.m. Eastern Time. Later in the day, they may be busy and unable to take your call. (If you are calling about a specific nonprofit, it’s best to have the name and EIN when you call).