- 7 - Where the validity of the underlying tax liability is properly in issue, the Court will review the matter de novo. Where the validity of the underlying tax is not properly in issue, however, the Court will review the Commissioner’s administrative determination for abuse of discretion. Sego v. Commissioner, 114 T.C. 604, 610 (2000); Goza v. Commissioner, 114 T.C. 176, 181-182 (2000). Petitioner has not alleged that he did not receive the notices of deficiency. Petitioner had an opportunity to challenge the correctness of his tax liabilities for 2000 and 2001 by petitioning this Court from the notice of deficiency but failed to do so. Therefore, petitioner’s underlying tax liabilities were not properly in issue. Accordingly, we review respondent’s determination for an abuse of discretion. Petitioner did not receive notices of deficiency for 1998 and 2002. Petitioner could have challenged the underlying liabilities for those years. However, section 6330(c)(2) allows the taxpayer to raise only “any relevant issue relating to the unpaid tax or the proposed levy”, not “any” issue. Frivolous challenges to the underlying liability are not “relevant issues”. Hathaway v. Commissioner, T.C. Memo. 2004-15. In the instant case, the record indicates that the only issues petitioner raised throughout the section 6320Page: Previous 1 2 3 4 5 6 7 8 9 10 11 NextLast modified: November 10, 2007