PLACE OF SUPPLY in case of service

shashank kumar (73 Points)

13 February 2020  
if I have CA firm in delhi and provide professional services to company in Maharashtra but services provided from the place where my ca office is.

Whether is it mandatory to get the Maharashtra GSTN registration number or to provide bill to company by putting IGST ?

Also please provide section under which above explanation of the GSTN REGISTRATION for the mandatory point requirements or not in case of place of supply?