HSN reporting: invoices must record detailed HSN classification for specified chemical supplies, tightening invoice compliance. Amendment inserts a proviso requiring registered persons to mention eight number of digits of HSN Codes in tax invoices for the classes of supply listed in the Table. The Table enumerates specified chemical substances and their HSN Codes-covering phosphonates, phosphonic acids and derivatives, cyanides, various chlorides and phosphites, selected amino and hydroxy compounds, polymers and intermediates-some entries marked 'As applicable.' The notification is issued under rule 46 and is deemed effective from 1st December, 2020.