The news seems to be fake news we have to wait for official announcement because without government interaction it is not possible to accept bitcoin.
That's why people should wait for official announcement from the owner of Amazon.
Why something from a government should be needed for Amazon to accept Bitcoin as a payment method. Do you think retailers ask for govt to be able to accept Paypal, cards etc? Nope. None of the currents merchants accepting Bitcoin asked something to any institution.
Since Amazon is expert about taxes optimizations, to who they should ask permission? USA, Luxembourg, Ireland? U.N.?