Complex sentence: She opposes the direct European tax favoured by the leaders of the European Parliament and European Commission, claiming that an indirect European tax already exists, since France is a net annual contributor to the EU budget by up to 7 billion euros annually.
Split into simpler sentences: She opposes the establishment of a direct European tax, which is favoured by the leaders of the European Parliament and European Commission. She claims that an indirect European tax already exists, since France is a net annual contributor to the EU budget by up to 7 billion euros annually.