MPs are ready to haul Amazon back to parliament to answer new questions about its tax status in Britain after a Guardian investigation's findings suggest the online retailer is pushing the tax rulebook to its limits to minimise its tax bill. Company filings showed Amazon's main UK company paid just £3.2m in corporation tax on sales of £320m last year. However, the Seattle-based group has told investors its 2012 UK sales were £4.2bn. The Guardian investigation has found…tax authorities unable, or unwilling, to prevent the imposition of aggressive tax avoidance structures…An Amazon spokesman said: "Amazon pays all applicable taxes in every jurisdiction that it operates within. Amazon EU serves tens of millions of customers and sellers throughout Europe from multiple consumer websites in a number of languages dispatching products to all 27 countries in the EU. We have a single European headquarters in Luxembourg with hundreds of employees to manage this complex operation." [also refers to Google, Ernst & Young,