NRI salaried individual taxation

It should be treated as DTAA

He is earning 4 lakh per month. How to show this income and pay tax in india. Please let me know clearly.

DTAA means , agreement between India and Singapore GoVT, to Avoid double taxation , because he is working for Singapore and getting salary , He may be paying taxes to Singapore GoVT through his salary , also he is working here so he has to pay taxes here in India also , so to avoid double taxation , Taxation will be as per DTAA.( Double taxation Avoidance Agreement ) .

You contact  to nearby CA  , he will guide you .

For knowledge purpose

Assuming he is non resident

What if DTAA was not there ,will the income be chargeable to tax in India by reason of section 9(1)(ii)?