This course intends to provide solid foundations to identify, comprehend and resolve issues arising from the interaction between the national tax system and the European Union. Centred on direct taxation, the course looks at positive and negative integration issues, studies European case law and its impact, as well as the most recent developments in European tax law, i.e., the directive proposal on the Common Consolidated Corporate Tax Base (CCCTB), new regulation of information exchanges and levying or taxing financial transactions.