As per the latest update from the GST E-invoice system on December 04, 2023, it has been mandated that a minimum of 6 digits of the HSN code will be compulsory in e-Invoices for taxpayers with an Aggregate Annual Turnover (AATO) of 5 Crore and above. This requirement will come into effect from December 15, 2023.The GST E-way bill system, in its update on September 05, 2023, specified that as per Notification No. 78/2020 dated October 15, 2020, businesses with an Annual Aggregate Turnover (AATO) surpassing Rs. 5 Crore are required to incorporate a minimum 6-digit HSN code in both their e-Invoices and e-Waybills. On the other hand, businesses falling below this turnover threshold should include a minimum 4-digit HSN code in their E-Invoices and GST E-Way Bills.