GST payment process mandates electronic challans, online payments and paperless reconciliation for tax remittance and accounting The GST payment process requires electronic challan generation via the GSTN common portal for all payment modes, prohibits manual challans, and provides online, anytime payment. It emphasizes paperless transactions and digital challan warehousing to create logical electronic tax collection data, simplify bank procedures, expedite remittance to government accounts, and enable speedy accounting, reporting and electronic reconciliation of receipts.