The recent Infosys GSTN update has made it mandatory to include a consolidated HSN (Harmonized System of Nomenclature) summary for all B2C (Business-to-Consumer) transactions in GSTR-1 filing. Earlier applicable mainly to B2B and high-value B2CS invoices, this significant change now requires businesses to classify and report even small B2C sales by HSN code. The update aims to improve transparency, data accuracy, and tax compliance. This blog details the key implications for businesses, steps for reporting the B2C HSN summary in Table 12 of GSTR-1, HSN digit requirements, and best practices to ensure seamless compliance under the new GST regime.