79% of global executives describe international tax environment as “uncertain” 82% experienced tax authority challenges to their transfer pricing over the past three years Greatest impact of global tax reform to be felt in fundamental transfer pricing rules Accelerated upheaval across the international tax landscape spurred by tax reforms across the world as well as initiatives such as the OECD’s digitalization effort have led to unprecedented uncertainty among global tax executives. This is according to the EY Transfer Pricing and International Tax Survey 2019, which surveyed more than 700 senior tax and transfer pricing executives representing the Americas, Europe and Asia-Pacific.