My Clients is an Indian PAN holder in FY 2018-19
01/04/2018 to 19/08/2018 he will be in India Salary will paid by Indian Co.
20/08/2018 to 15/11/2018 his Indian co will depute him to Vietnam on BUSINESS Visa - Salary will paid by Indian Co.
16/11/2018 to 30/04/2019 his Indian co will depute him to Vietnam on WORK Visa - Salary will be paid by Foreign Co.
Query-
1. Where he will Filed Income Tax Return in India OR Vietnam
2. TAX Benefit ?? , In Vietnam Tax is 35%
3. In above whether he will be RESIDENT or NRI
Please guide me