You can contact the Taxpayer Advocate Service (TAS) in several ways: (1) Call the TAS toll-free number at 1-877-777-4778 and speak with an intake advocate, (2) Visit a local TAS office (locations can be found at www.irs.gov/advocate/local-taxpayer-advocate), or (3) Submit a request for assistance online at www.irs.gov/advocate/file-a-request-for-taxpayer-advocate-service-assistance. When contacting TAS, be prepared to provide detailed information about your tax issue, including any correspondence you’ve received from the IRS and any actions you’ve already taken to resolve the issue.