Reason to obtain registration

Rakesh Kumar Kumawat (76 Points)

17 December 2019  
Sir my question is  a person make Supplyof goods through government website (not Amazon, Flipkart etc) to another state person. 

Which option select in reason to obtain registration:-
Voluntarily registration or Supply make through e commerce portal

He only received order through government website and Supply make through own transportation, full responsibility of supplier.
Thank you