- 12 - upon financial advisers and accountants in making an investment and claiming a loss. On the contrary, she was a medical doctor with previous involvement in several other types of investments. Furthermore, petitioner did not thoroughly review the private placement memorandum, despite her investment experience, and made little or no effort to monitor her investment. We uphold respondent’s determination that petitioner is liable for the section 6653(a)(1) and (2) additions to tax for negligence. The second issue for decision is whether petitioner is liable for the addition to tax under section 6661 for a substantial understatement of tax. 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 exceeds the greater of 10 percent of the tax required to be shown on the return, or $5,000. See sec. 6661(b)(1)(A). Generally, the amount of an understatement is reduced by the portion of the understatement which the taxpayer shows is attributable to either (1) the tax treatment of any item for which there was substantial authority, or (2) the tax treatment of any item with respect to which the relevant factsPage: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Next
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