E-invoicing threshold reduction narrows applicability to smaller taxpayers, expanding mandatory e-invoice coverage under state GST rules. Amends the state GST notification to lower the e-invoicing aggregate turnover threshold, widening the class of taxpayers required to generate e-invoices under the Karnataka Goods and Services Tax Rules by substituting the previous higher turnover threshold with a lower one and making the revised turnover criterion operative from the stated commencement date.