- 9 - affg. T.C. Memo. 1994-217; Turner v. Commissioner, T.C. Memo. 1995-363. In this regard, the determination of negligence is highly factual. In his testimony quoted above, petitioner indicated that he spent very little time investigating the viability of an investment in jojoba farming or the likely tax treatment of that investment, relying on his experience in similar investments. He offered in evidence at trial tax returns from earlier years on which he had deducted various partnership losses. Among the papers that he presented, however, was a decision where this Court determined that he owed a deficiency and a negligence addition to tax for 1981. Petitioner’s experience is not persuasive evidence that he was qualified to assess the viability and the proper treatment of the Cal-Neva partnership, relying solely on the promoters. Based on the limited effort described by petitioner and consistent with all opinions in similar cases, we conclude that petitioners failed to exercise reasonable care and are liable for the additions to tax for negligence. Section 6661(a), as amended by the Omnibus Budget Reconciliation Act of 1986, Pub. L. 99-509, sec. 8002, 100 Stat. 1951, provides for an addition to tax of 25 percent of the amount of any underpayment attributable to a substantial understatement of income tax for the taxable year. A substantial understatement of income tax exists if the amount of the understatement exceedsPage: Previous 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NextLast modified: March 27, 2008