-61- Petitioner bears the burden of proving that respondent's determinations are erroneous. Rule 142(a). We find that petitioner was negligent with respect to the positions it took on each of these items. Jack is an attorney whose practice includes estate planning and general tax services; therefore, he either knew or should have known that the claimed items are not allowable. Section 6664(c) provides that no penalty shall be imposed under section 6662 with respect to any portion of an underpaymentPage: Previous 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 Next
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