John Anthony Castro
John Anthony Castro (born October 4, 1983) is an American tax return preparer and perennial candidate who has unsuccessfully run for political office as both a Republican and a Democrat. Castro is known for his involvement in Dixon v Commissioner and its related cases, an extensive series of court rulings that — in finding that Castro's clients improperly filed their tax returns — ruled that certain authentication requirements are not subject to waiver.
John Anthony Castro | |
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| Born | October 4, 1983 Landstuhl, Germany |
| Education | Texas A&M International University (BA) University of New Mexico (JD) Georgetown University (LLM) |
| Occupation | Tax return preparer |
| Political party | Republican (2020–present) |
| Other political affiliations | Democratic (before 2020) |
| Movement | Never Trump movement |
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Castro is a self-described attorney, though has never been licensed to practice law. According to the New York Times, he has been involved in a "dizzying array of legal disputes", and has sued or been sued by clients, competitors, government agencies, and others. In 2024, he was indicted on 33 felony charges of tax fraud, though he denies all wrongdoing. A United States District Court ruled him to be a "vexatious litigant."