NRI return

Samrat Karar (110 Points)

01 October 2019  
My one client is an NRI and stays in Africa and earn salary from there. He deposit his income from there to NRE account. His salary income is non taxable in our country because he pay tax for that income. But in 18-19 he also bring some other money other than salary. But this income has no documents. please suggest how I show this income in retun? Is this income is taxable in oir country ? please suggest.