Amazon, is treating you as a non-resident alien for US tax purposes. In such case there is a requirement to withold 30% of gross payments/earnings by the agent ( in this case Amazon). I don't believe it makes any difference as to your citizenship or residency ( other than claiming treaty benefits). Where I have a doubt here is that you gross income from US sources is being treated as net income. However, you can file a 1040-NR showing your expenses and hopefully things would get more in line . Note that TurboTax does not support non-resident alien filing ( 1040-NR) directly but a sister organization does. Perhaps you should consult a local tax person familiar with US tax laws. Good Luck
