For the OECD's tax policy chief, years of negotiations on the global corporate tax deal has been a "roller coaster ride" of different approaches by the nations involved. The organization is hoping to see efforts come together with major parts of it resolved this summer, says Grace Perez-Navarro, who is retiring Friday.

Countries are pushing to meet a midyear deadline on the remaining key pieces of the deal, including what is known as Amount A—the reallocation of some multinational profits—and Amount B, a plan to streamline some transfer pricing.

Perez-Navarro sat down with Bloomberg Tax reporter Isabel Gottlieb this week ahead of her last day as director of the Organization for Economic Cooperation and Development's Center for Tax Policy and Administration. She stepped into the director role last year after serving as deputy director since 2007.

She talked about the status of remaining work on the agreement and what issues countries are still negotiating, as well as remote work taxation, and how the OECD is helping governments discuss carbon taxes.

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