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For millions of immigrants, obtaining U.S. citizenship represents the culmination of a long and challenging journey. But under the new enforcement priorities announced by the Department of Justice (DOJ) in 2025, that achievement has become associated with an unprecedented level of tax scrutiny. The intersection between tax obligations with the Internal Revenue Service (IRS) and naturalized citizenship status has become one of the most sensitive issues in contemporary U.S. immigration.
The Expansion of Denaturalization Priorities
Denaturalization is the process by which the U.S. government revokes citizenship granted through naturalization. Historically applied to cases involving war crimes, terrorism, or serious fraud in the immigration process, the tool gained new breadth with the DOJ Civil Division memorandum of June 2025.
The memorandum lists ten priority categories for investigation, two of which are directly relevant to tax matters: financial fraud against the U.S. government (including fraud in programs such as Medicare, Medicaid, and PPP loans) and participation in private financial fraud schemes. Tax evasion and false reporting are explicitly listed among the conduct that can trigger an investigation.
An estimated 25 million naturalized citizens currently live in the United States. While most will never face any scrutiny, the expansion of enforcement priorities makes this topic relevant to everyone.
The Legal Link: Form N-400
The legal bridge between tax obligations and citizenship lies in Form N-400, the instrument used to apply for naturalization. In its Part 9, Question 15a, the applicant is asked:
“Have you ever committed, assisted in committing, or attempted to commit a crime or offense for which you were not arrested?”
If an applicant evaded taxes, underreported income, or committed another tax violation before naturalization and answered that question negatively, the government may later allege that there was fraud or concealment of a material fact. Because civil denaturalization has no statute of limitations, this exposure persists for the entire life of the naturalized citizen.
Other sections of the N-400 are also relevant: Part 12 expressly asks whether the applicant is current on federal, state, and local tax obligations, and whether they have ever failed to file required tax returns.
The Growing Role of the IRS
The government’s ability to initiate these proceedings depends largely on access to data. In 2025, the Department of Homeland Security (DHS) intensified requests to the IRS to obtain tax information that can be cross-referenced with immigration records and naturalization proceedings.
The Internal Revenue Code, in its section 6103, establishes strict protections for the confidentiality of tax returns, and the IRS has historically resisted sharing data for non-tax purposes. However, specific legal exceptions, combined with memoranda of understanding between federal agencies, are progressively expanding areas of interagency cooperation.
This trend indicates that tax compliance is becoming part of immigration enforcement, even as the IRS formally preserves its operational independence.
Practical Consequences for Naturalized Citizens
The scope of this new approach has concrete implications. Successful civil denaturalization returns the individual to their immigration status prior to naturalization. Those who were lawful permanent residents revert to green card status; those without valid status face removal proceedings.
Unlike the criminal route, governed by 18 U.S.C. § 1425 with a 10-year statute of limitations, civil denaturalization is virtually timeless. A citizen naturalized in 1995 could theoretically have their citizenship challenged in 2026 based on undisclosed tax conduct prior to the naturalization process.
Limits Set by the Supreme Court
It is important to note that the Supreme Court, in Maslenjak v. United States (2017), limited the scope of criminal denaturalization: only lies or omissions that directly influenced the decision to grant citizenship can support revocation. Immaterial errors are not sufficient.
Although this precedent specifically addresses the criminal route under 18 U.S.C. § 1425, its materiality standard has also been influencing judicial analysis of civil cases, offering an important defense against revocations based on minor or administrative irregularities.
Protection Strategies and Compliance
Naturalized citizens who have concerns about their tax history should consider a full review of returns filed in the five years prior to naturalization (the standard eligibility period for the N-400, or three years for those married to U.S. citizens). The review should verify consistency between declared income, reported assets, and answers given on Form N-400.
For situations where prior omissions are identified, the IRS offers voluntary compliance programs such as the Voluntary Disclosure Practice and the Streamlined Filing Compliance Procedures, although participation in these programs does not guarantee automatic immigration immunity. Coordination between an immigration attorney and a qualified accountant is essential in these cases.
Maintaining complete tax documentation throughout one’s life has become a prudent practice for naturalized citizens. Tax returns, payment receipts, IRS correspondence, and amendment records filed in an organized manner can be decisive in any future review.
The post-2025 landscape reinforces that U.S. citizenship, while legally solid, requires naturalized citizens to maintain continuous attention to tax and documentary integrity throughout their lives.
Victoria Harper
Editor-in-Chief
Leading journalism and editorial content at Visto n’ Visa, Victoria helps make immigration topics clear, trustworthy, and easy to understand. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.
