Here is the **updated full HTML code** with the new field added: ✔️ Added **DIFFERENCE AMOUNT (INR)** field ✔️ Included in popup preview ✔️ Included in WhatsApp message --- ```html ``` --- If you want next upgrade, I can add: * ✅ Auto calculation (Bill vs Paid → Difference auto) * ✅ Admin dashboard view * ✅ Excel export * ✅ Serial auto numbering Just tell 👍