Brussels, 09/01/2007 (Agence Europe) - On Tuesday the European Commission sent Portugal a formal request to amend its legislation concerning the tax rules according to which non-resident entities providing services in Portugal are subject to a withholding tax based on the gross amount of their income, whereas domestic providers are taxed only on their net profits. The Commission considers that these rules are incompatible with the EC Treaty, which guarantees the free provision of services....