https://www.theregister.co.uk/2019/12/04/silicon_valley_tax/

Fair Tax Mark, a UK-based civic advocacy group, has accused Apple, Amazon, Facebook, Google, Microsoft, and Netflix of depriving public coffers of more than $100bn in taxes since 2010 through aggressive tax avoidance schemes.

On Monday, the non-profit group said it plans to release a report this week titled, "The Silicon Six and their $100 billion global tax gap," which shows that the six tech companies have underpaid their tax obligations from 2010 through 2018 based on statutory tax rates.