BRASILIA, Aug 17 (Reuters) - Brazil’s lower house of Congress on Tuesday postponed a vote on a tax reform bill that would introduce taxation of company dividends because it faced defeat due to a lack of consensus. The bill would slap a 20% tax on dividends and cut the corporate income tax rate. Business lobbies oppose the proposal saying it would increase an already heavy tax burden on companies in Brazil. (Reporting by Maria Carolina Marcello; Editing by Sandra Maler) Our Standards: The Thomson Reuters Trust Principles.