Double taxation query

Hi,

I have a query regarding double taxation. Suppose if someone enrolled in a US-based affiliate marketing online business and he is required to pay 30% tax to the US government through W 8 BEN form for his services provided from India( i.e income received from the USA while working online from India as an affiliate marketer or digital marketer) so does he need to pay tax to the Indian government as well? If yes then what kind of TAX that would be ? is it service tax, Income tax or GST? Since he is already going to pay Tax to the US government then does he need to pay Taxes to the Indian government as well as a double taxation? Please clarify.

Thanks!
Vaibhav