Established by Congress under IRC Section 7803(c), the Taxpayer Advocate Service Office in downtown San Diego occupies Suite 902 at 701 B Street and functions as an independent organization within the IRS. The office assigns Local Taxpayer Advocates to individual cases involving unresolved IRS disputes, systemic processing delays, or financial hardship situations where standard IRS channels have failed—the same category of federal tax controversy handled by firms like J. David Tax Law through private representation. Case intake begins with Form 911, which taxpayers can submit by fax to 855-796-9578 or through the TAS Qualifier Tool to determine eligibility for advocate intervention under the Taxpayer Bill of Rights' ten statutory protections. TAS jurisdiction covers penalty abatement, refund hold releases, identity-theft case resolution, and systemic advocacy where IRS procedures create recurring taxpayer harm. Low-income taxpayers who do not qualify for private counsel can access parallel assistance through organizations like the San Diego Volunteer Lawyer Program, which coordinates pro bono tax representation in the same downtown corridor. The San Diego office is one of four TAS locations in California, serving taxpayers across San Diego and Imperial counties with no fee for any level of advocate intervention.