As per earlier those T/o was upto 500 cr,it was mandatory from 1st oct 20, now one more addition as per new notification in Nov 20, that whose T/o is more than 100 cr (aggregated Pan base) is applicable Einvoice from 1 1 21
As per Notification No. 88/2020 - Central Tax, dated, 10th November 2020, W.e.f 01/01/2021 Taxpayers having Aggregate Turnover more than Rs. 100 crores are required to generate E-Invoice.
@ SDR Associates, As per FAQ No. 27 on GST e-invoice / IRN System ( Version 1.3 ) issued by GSTN, dated 11th November 2020, it has been clearly clarified that for the time being generation of e-Invoice will be mandatory "only for notified class of taxpayers" and that too for their B2B Supplies and no "Voluntary generation of e-Invoicing will be allowed".
EXTRACT FROM THE FAQ's :
27). Is e-invoicing voluntary, i.e. can entities with aggregate turnover below the prescribed limit also report invoices to IRP, if they wish to do so?
Answer : No, presently, only the notified class of persons will be allowed / enabled to report invoices to IRP.