When should you apply for a multiple GST registration as a business owner?

GST was introduced in parliament on the 29th of March, 2017 and came into effect on the 1st of July, 2017. It becomes pertinent to conduct the GST registration process in India before starting a business.

source https://www.caclubindia.com/articles/multiple-gst-registration-as-business-owner-44524.asp