How do students pay school fees online?
From the student login on the web. Open Pay Fee, pick what you're paying and go through the school's own gateway (Razorpay, Stripe, Paytm, HDFC (via CCAvenue) or PNB). The payment is posted to your fees straight away, the receipt appears under Payments, and if your school has email set up, the receipt is emailed to you and your parent.
If a late fine has been added, the dashboard shows a Pay Fine tile with the amount, which opens the same page. Online payment works only here: the app and the parent login show fees and receipts but don't take payments. See fees and online payments for how the school sets it up.