@user5924704 , your questions are answered below :
1. In my case, could I file the 1040-NR through Turbotax?
----- TurboTax does not support Non-Resident tax returns ( form 1040-NR ). Generally they suggest using their partner SprinTax. I think this is an on-line service. You may also find a local tax professional doing taxes for the US ExPat community ( like the military, etc. ).
2. Could you explain how I can claim this in the 1040-NR? Or is there a separate form to be submitted for this Foreign Tax? Is there any documentation I should obtain from the National tax agency in my home country Japan?
----- for claiming foreign tax credit on your US return, you use the form 1116. This form requires the following information ---
(1) in the type of income box, you select " resourced by treaty" -- this allows you to take US sourced income and resource this as foreign ONLY for purposes of form 1116;
(2) the foreign source income is the award amount as received by you
(3) Foreign source income country is Japan
(4) Foreign Taxes Paid is the tax imposed by Japan on this doubly taxed income.
The foreign tax credit is the lesser of US imposed Tax on this income AND that paid to Japan in your particular case.
Is there more I can do for you ?
