- 8 - Giddio v. Commissioner, 54 T.C. 1530 (1970). Having failed to establish the applicability of section 7491(a), petitioners have the burden of establishing additional amounts of cost of goods sold over the amount respondent has determined in the notice of deficiency. See Rule 142(a). Respondent reduced petitioners’ cost of goods sold for 1998 to $5,818 after the first audit. Exhibits and testimony at trial establish that this cost of goods sold figure is understated and that petitioners have substantiated additional costs of goods sold of $17,680, consisting of expenses that Mr. Rusten incurred buying equipment and materials for the railroads for which he provided consulting services. Petitioners argue that there were additional cost of goods sold items, but the documentation in the record simply does not sustain any additional amounts. Under section 6662(a) and (b)(1) and (2), taxpayers are liable for a penalty equal to 20 percent of the portion of the underpayment of tax attributable to negligence or to a substantial understatement of income tax. A substantial understatement of tax exists if the amount of the understatement exceeds the greater of (1) 10 percent of the tax required to be shown on the return, or (2) $5,000. Sec. 6662(d)(1)(A). Respondent has satisfied his burden of production under section 7491(c) because petitioners understated their income tax by more than 10 percent and by more than $5,000.Page: Previous 1 2 3 4 5 6 7 8 9 10 NextLast modified: March 27, 2008