U.S. Readies Digital-Tax Pushback With Almost $1 Billion Tariffs

With a growing number of countries choosing to tax the revenue of internet giants such as Amazon and Facebook, the U.S. — where many of world's biggest online firms are based — is looking for ways to push back.

Washington is weighing up whether to hit six nations that have already started taxing Internet-based companies with retaliatory tariffs that could total almost $1 billion annually.