Business News Microsoft Fights $29 Billion US Back Tax Claim The US Internal Revenue Service is asking that Microsoft pay a whopping $29 billion in unpaid taxes from 2004 to 2013, More… Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related UAE and US Presidents discuss regional developments in phone call Emirates deploys 20,000 Apple products to Cabin Crew to transform inflight services