Who should tax multinationals? National political figures sometimes signal their assumptions by making superior or even exclusive claims about who may tax “their” multinational companies, and it is common to hear such companies or their incomes referred to as “belonging” to one nation or another. The rhetoric reflects conventional wisdom about sovereign nations and their assumed entitlements, and is often invoked to curb or even sanction the seemingly excessive tax jurisdictions of some nations. But this conventional wisdom often ignores the fundamental dependence of multinationals on ongoing, extensive, and multifaceted regulatory cooperation involving most of the nations of the world. The goal of this essay is to demonstrate that given this dependence, there are no clear legal or normative boundaries to virtually any asserted tax jurisdiction. The claim provides a solution for neither double taxation nor the problems associated with excessive tax competition, but the essay concludes that recognizing the dependence of governments and “their” multinationals on multilateral cooperation should lead to an increase in focus on how nations go about negotiating the terms of their cooperation on tax.