- 12 - Commissioner, supra. Petitioner bears the burden of proving that the failure to file timely was both due to reasonable cause and not due to willful neglect. See Rule 142(a); United States v. Boyle, 469 U.S. 241, 245 (1985). The fact of submission of a case fully stipulated under Rule 122(a) does not alter the burden of proof, or the requirements otherwise applicable with respect to adducing proof, or the effect of failure of proof. See Rule 122(b). The estate tax return was filed more than 18 months after the extended due date. Petitioner has not shown that the delinquent filing was due to reasonable cause. Furthermore, we find the fact that the executor was waiting for an opinion of the size of the discount for blockage is not reasonable cause for the failure to file a timely return. The record shows that both the value of the gross estate and the estate tax liability were less on the alternate valuation date than on the date of decedent's death without consideration of the discount for blockage. See sec. 2032(c). Moreover, the estate tax return was not filed until more than 1 year after the executor received the firm's valuation report. It is clear that the executor should have filed the estate tax return on time, electing alternate valuation (and attaching whatever explanation was appropriate), continued to seek the necessary information, and then filed a supplemental return withPage: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
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