Thomson Reuters (TR) has acquired Deloitte LLP's Abacus tax compliance business. Abacus offers software that helps companies plan, comply and submit income tax and value added tax. Following, the deal, TR plans to integrate Abacus's business with its own tax planning, transfer pricing and workflow management business. The Office of Fair Trading cleared the merger, finding that the parties' products are largely complementary and that TR will continue to face significant competition for the supply of tax compliance software from other competitors.