-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 underpayment
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