- 13 - liable for the addition to tax. See id. at 447. Petitioner’s 2003 income tax return was due on October 15, 2004, but was not filed until January 3, 2005. We find that respondent has met his burden of production. “A failure to file a tax return on the date prescribed leads to a mandatory penalty unless the taxpayer shows that such failure was due to reasonable cause and not due to willful neglect.” McMahan v. Commissioner, 114 F.3d 366, 368 (2d Cir. 1997), affg. T.C. Memo. 1995-547. A showing of reasonable cause requires taxpayers to demonstrate they exercised “ordinary business care and prudence” but were nevertheless unable to file the return within the prescribed time. United States v. Boyle, 469 U.S. 241, 246 (1985); sec. 301.6651-1(c)(1), Proced. & Admin. Regs. Generally, factors that constitute “reasonable cause” include unavoidable postal delays, death or serious illness of the taxpayer or a member of his immediate family, or reliance on the mistaken legal opinion of a competent tax adviser, lawyer, or accountant that it was not necessary to file a return. McMahan v. Commissioner, supra at 369. Petitioner contends that she had reasonable cause for filing late, and that the late filing of her return is because of her responsibility to care for her brother after he was released from the hospital in December 2003. Petitioner argues that it took more than 5 months to secure reliable caregivers, and that herPage: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NextLast modified: March 27, 2008