- 5 - III. Accuracy-Related Penalties Section 6662 imposes an accuracy-related penalty equal to 20 percent of any underpayment attributable to a substantial understatement of income tax. See sec. 6662(a) and (b)(2). Petitioners have not established, pursuant to section 6664(c)(1), that there was a reasonable cause and that they acted in good faith in claiming the deductions. Accordingly, petitioners are liable for the accuracy-related penalties. To reflect the foregoing, Decision will be entered under Rule 155.Page: Previous 1 2 3 4 5
Last modified: May 25, 2011