Economy GST e-invoice generation system on government portal on anvil Updated : April 28, 2019 01:29 PM IST GST officers are working on a system where businesses above a certain turnover threshold will have to generate 'e-invoice' on government or GST portal for every sale. To start with, businesses above a specified threshold will just get a unique number for every electronic invoice or e-invoice generated. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.