HSN code digit requirement on tax invoices updated by turnover category, with limited omission for supplies to unregistered persons. Substitutes the invoice-content table to require HSN code digits based on aggregate turnover: suppliers with aggregate turnover up to five crores rupees must report four HSN digits, and those with turnover exceeding five crores rupees must report six HSN digits; effective from 1 April 2021. A proviso permits a registered person with aggregate turnover up to five crores rupees in the previous financial year to omit the applicable HSN digit requirement when issuing tax invoices for supplies to unregistered persons.