In 2019 India’s Good and Services Tax Counsil (GSTC) announced the implementation of the GST e-invoice/IRN system, that falls under the Goods and Services Tax system (GST System).
The mass implementation of the GST e-invoice/IRN System is being carried out in phases. They begin with a voluntary phase that will then be followed by mandatory ones. The first mandatory phase will include companies that invoice over 500 crore per year beginning on October 1st 2020.
Source Edicom
