Usa income , dtaa is prevaling , help me

sanjana dami (CA final student) (68 Points)

11 February 2016  

Can anyone help me how to calculate tax and file return.

My brother has 10 months salary income ( $ 1,29,450 , which is approx 88,49,195.53 Indian Rupee) in USA  and coming 2  month ( feb and march) in singapore  and DTAA is prevailing in both the cases .

help me understanding what both of these DTAA is talking about tax on salary . and how i will file his return in april .