In the case of Commissioner of Internal Revenue v. Nader E. Soliman, 1992, the U.S. Supreme Court ruled on whether a home office used by anesthesiologist Dr. Nader Soliman could be considered his principal place of business for tax deduction purposes under Section 280A(c)(1)(A) of the Internal Revenue Code (IRC). The IRS had denied Dr. Soliman's deductions related to his home office expenses arguing that it was not his primary place of business as he spent most time at hospitals administering anesthesia and consulting with patients rather than in his home office where he performed administrative tasks such as scheduling surgeries and billing patients. The court held that while these activities were essential to Dr. Soliman's medical practice, they did not constitute income-generating tasks which would qualify the space as a principal place of business under IRC guidelines since majority part is done outside this location i.e., at hospital premises where actual services are rendered. This decision clarified how "principal place" should be interpreted within context - focusing on importance or significance attached to functions carried out there rather than just amounting total hours spent working from each location.

In the dissenting opinion for Commissioner of Internal Revenue v. Nader E. Soliman, Justice Blackmun argued that the majority's interpretation of "principal place of business" was too narrow and failed to consider modern work realities. He contended that a taxpayer should be able to deduct home office expenses if their employment requires them to perform substantial administrative tasks from home, even if they also spend significant time working at other locations. In his view, this approach would better reflect Congressional intent and provide fairer treatment for taxpayers who are required by their jobs to maintain a home office.