How can you find out the IRS customer service phone number?

The IRS customer service phone number can be found on the Internal Revenue Service website by clicking on the Contact Your Local IRS Office link, then clicking on the Phone hyperlink under Taxpayer Assistance Centers. This provides numbers for different categories of callers, such as individuals, businesses and exempt organizations.

The topics handled by these customer service numbers are limited, and the wait times can be lengthy. Callers can ask about notices received and get assistance with preparing a tax return. The hours of operation are Monday through Friday, 7 a.m. to 7 p.m. local time, with Alaska and Hawaii following Pacific time.