Both a certified public accountant and a California-licensed attorney, Joseph Jay McGuire runs a dual-credential practice in San Diego's San Carlos neighborhood from Suite J at 7185 Navajo Rd, where the 92119 ZIP anchors the commercial block south of the Cowles Mountain trailhead. The Law Office of Joseph J. McGuire, APC, incorporated in California on July 31, 2001, under Secretary of State document number C2284000, combines tax-preparation services with estate-planning and tax-litigation representation under a single corporation. Tax preparation covers individual 1040 returns, fiduciary Form 1041 trust and estate returns, and business filings across partnership, S-corporation, and C-corporation structures. Small-business tax clients along the Navajo Road and Lake Murray Blvd corridors receive entity-selection consulting, quarterly estimated-tax calculations, and year-end planning sessions that evaluate Section 199A deductions, retirement-plan contributions, and depreciation elections on the commercial equipment and fleet vehicles common among service businesses such as John's Automotive Care in Allied Gardens. Estate-planning services draft revocable and irrevocable trust instruments, pour-over wills, advance healthcare directives, and durable powers of attorney, with the CPA credential allowing McGuire to model the income-tax and estate-tax consequences of each planning structure before documents are executed. Tax-controversy representation leverages the combined CPA and attorney standing to handle IRS audits, Tax Court petitions, offer-in-compromise negotiations, and innocent-spouse relief claims — a procedural range that a preparer without bar admission cannot cover. The practice also coordinates document production — including K-1 packages, closing-statement analyses, and IRS correspondence filings — with the print-and-ship capabilities at ECG Graphics & Printing when client deliverables require certified-mail submission or large-format document preparation. The Navajo Road office sits within a mile of the Cowles Mountain trailhead, anchoring the San Carlos cluster that serves the residential neighborhoods east of Lake Murray. Tax-planning consultations model multi-year scenarios for clients approaching retirement, calculating required-minimum-distribution schedules, Roth-conversion tax exposure, and Social Security taxation thresholds against projected filing-year income.