¶1OPINION
¶2The issue for decision is whether respondent abused his discretion when he precluded petitioner, at the 2005 hearing, from challenging petitioner’s underlying tax liability and sustained the notice of Federal tax lien relating to petitioner’s 1997 liability.
¶3Background
¶4Petitioner failed to file his 1997 Federal income tax return. By notice dated September 15, 2000, respondent determined a deficiency in, and additions to, petitioner’s 1997 Federal income tax. Respondent mailed such notice to petitioner, but petitioner did not receive it.
¶5On April 27, 2002, a Notice of Intent to Levy and Notice of Your Right to a Hearing relating to 1997 was; mailed to petitioner. On May 22, 2002, petitioner timely filed a Form 12153, Request for a Collection Due Process Hearing (2002 request). In the 2002 request, petitioner contended that he “was never provided proof of the amount allegedly owed, neither in direct documentation, nor statements of how rules/ laws and calculations were applied.” The Appeals officer scheduled a hearing for October 5, 2002 (2002 hearing). In a letter dated August 30, 2002, the Appeals officer informed petitioner that the underlying tax liability could not be challenged at the 2002 hearing because petitioner had a prior opportunity to dispute the liability. In a letter dated September 5, 2002, the Appeals officer enclosed a copy of the notice of deficiency and reiterated that petitioner could not, at the 2002 hearing, challenge the underlying liability. Petitioner failed to appear at the hearing and did not attempt to schedule another hearing. As a result, on June 9, 2003, respondent issued petitioner a Notice of Determination Concerning Collection Action(s) Under. Section 6320 and/or 6330 (2003 notice of determination).
¶6The 2003 notice of determination stated that the underlying liability “cannot be considered under this process” and “if you want to dispute this determination in court, you must file a petition with the United States Tax Court for a redeter-mination within 30 days from the date of this letter.” Petitioner did not file a petition with the Court or otherwise dispute respondent’s 2003 notice of determination. Respondent, however, did not proceed with the proposed collection, action.
¶7On September 8, 2004, respondent mailed petitioner a Notice of Federal Tax Lien Filing and Your Right to a Hearing Under IRC 6320 (2004 nftl) relating to 1997.
¶8On June 7, 2005, petitioner, while residing in London, Ohio, filed his petition with the Court seeking a review of the 2005 notice of determination. On January 4, 2006, the Court filed respondent’s motion for summary judgment and on February 27, 2006, denied the motion.
¶9Discussion
¶10Petitioner contends that he should have been allowed to challenge the underlying tax liability at the 2005 hearing and that respondent abused his discretion. Conversely, respondent contends that he did not abuse his discretion because petitioner had a prior opportunity to challenge the underlying liability and, thus, was precluded from subsequently raising the matter. We agree with respondent.
¶11Section 6330(c)(2)(B)
¶12Petitioner also contends that he should have been allowed, at the 2005 hearing, to contest the underlying liability because respondent erroneously precluded him, at the 2002 hearing, from doing so. In Heckler v. Cmty. Health Servs., 467 U.S. 51, 63 (1984), the Supreme Court stated that “those who deal with the Government are expected to know the law and may not rely on the conduct of Government agents contrary to law.” See Estate of Emerson v. Commissioner, 67 T.C. 612, 617 (1977) (holding that this Court will apply the doctrine of estoppel against the Government with the “utmost caution and restraint”). Despite respondent’s error, petitioner was entitled to petition this Court, dispute the determination, and challenge the underlying liability. Petitioner failed to do so and, thus, was precluded from subsequently challenging the underlying liability. Accordingly, respondent did not abuse his discretion and is not estopped from proceeding with the proposed collection action.
¶13Contentions we have not addressed are irrelevant, moot, or meritless.
¶14To reflect the foregoing,
¶15Decision will be entered for respondent.
¶16The record does not indicate why respondent failed to proceed with the proposed collection action after issuing the 2003 notice of determination or why the 2004 NFTL was necessary.
¶17 Unless otherwise indicated, all section references are to the Internal Revenue Code in effect for the year in issue.