- 11 - did not maintain a mileage log, and he did not attempt to reconstruct his auto expenses (i.e., by tying his clients’ business cards, which he did possess, to particular dates). The Court finds that petitioner has satisfied neither the strict substantiation requirements of section 274(d) nor the predominant use requirement. Therefore, petitioner is not entitled to expense the cost of the Jeep under section 179. Accordingly, respondent’s determination is sustained. E. Expenses for Business Use of the Home Expenses for the business use of a taxpayer’s residence are deductible only under very limited circumstances. The taxpayer must show that a portion of the residence was exclusively used on a regular basis as his principal place of business, and in the case of an employee, the exclusive use must be for the employer’s convenience. See sec. 280A(c)(1). The term “a portion of the dwelling unit” refers to “a room or other separately identifiable space;” a permanent partition marking off the area is not necessary. Sec. 1.280A-2(g)(1), Proposed Income Tax Regs., 48 Fed. Reg. 33324 (July 21, 1983).3 When section 280A(c) was added to the Internal Revenue Code by the Tax Reform Act of 1976, Pub. 3 Although proposed regulations carry no greater weight than a position advanced on brief by the Commissioner, they may be useful as guidelines where they closely follow the legislative history of the act. Estate of Wallace v. Commissioner, 95 T.C. 525, 547 (1990), affd. 965 F.2d 1038 (11th Cir. 1992); Miller v. Commissioner, 70 T.C. 448, 460 (1978); F.W. Woolworth Co. v. Commissioner, 54 T.C. 1233, 1265-1266 (1970)).Page: Previous 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 NextLast modified: March 27, 2008