Below is a list of IRS websites that provide phone contact information for various departments of the IRS:
The Telephone Assistance
website provides information on numbers available for IRS assistance for individuals, businesses, exempt organizations, retirement plan administrators, government entities, people with hearing impairments, individuals who believe they may be a victim of identity theft, people who live outside the United States and a list of local IRS offices.
The U.S. Citizens and Resident Aliens Abroad
website provides contact information including a TOLL number (not toll-free) to the IRS Philadelphia office which provides international assistance. It also contains information on permanent IRS offices outside the United States.
For Tax Practitioners/Preparers ONLY:
The IRS website Practitioner Priority Service
provides phone support for tax practitioners who have account-related questions with valid third party authorizations (i.e. Forms 2848, 8821 and/or 8655).