The government has notified mandatory requirement of e-invoicing for B2B transactions for businesses with a turnover over Rs 100 crore with effect from January 1, 2021. Under Goods and Services Tax (GST) law, e-invoicing for business-to-business (B2B) transactions is mandatory for companies with turnover of over Rs 500 crore from October 1. In a notification, the Central Board of Indirect Taxes and Customs (CBIC) said e-invoicing will be extended to businesses with a turnover over Rs 100 crore from January 1.