Internal Revenue Service (IRS) | USAGov
Reach out for assistance with tax inquiries. Toll-free service.

Phone support contacts for business clients - IRS
Business and Specialty Tax Line and EIN Assignment (800-829-4933) Regular Operating Hours: Monday to Friday, 7 am - 7 pm local taxpayer time; Alaska & Hawaii have different schedules ...

Avoid waiting on the line; use IRS digital tools for quicker assistance
IRS.gov provides the fastest and most convenient access to help. Visit IRS.gov at any time for answers to tax queries.