- 14 - 6621(c). The increased rate of interest under section 6621(c) is 120 percent of the statutory rate imposed on underpayments under section 6601 if the underpayment exceeds $1,000 and is attributable to a tax-motivated transaction (as defined in section 6621(c)(3)). The increased interest is effective only with respect to interest accruing after December 31, 1984, notwithstanding that the transaction was entered into before that date. Solowiejczyk v. Commissioner, 85 T.C. 552 (1985), affd. per curiam without published opinion 795 F.2d 1005 (2d Cir. 1986). This Court generally does not have jurisdiction to review assessment of section 6621(c) tax-motivated interest in affected item proceedings, even though the tax-motivated interest is an affected item that requires a partner-level determination. See White v. Commissioner, 95 T.C. 209 (1990); Korchak v. Commissioner, T.C. Memo. 2005-244; see also Ertz v. Commissioner, T.C. Memo. 2007-15. A narrow exception to this rule applies if a taxpayer has paid the assessed tax-motivated interest and subsequently invokes the overpayment jurisdiction of this Court under section 6512(b). See Barton v. Commissioner, 97 T.C. 548 (1991). Petitioners do not claim that they have paid the interest.Page: Previous 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NextLast modified: March 27, 2008