- 1. Visit https://zepbill.com/dashboard.
- 2. Click "Sales->Non-GST Invoices in left side Navigation Bar.
- 3. Open any invoice you want to update.
- 4. Click "Update Invoice" button.
- 5. Click "Contact Email" input field to update contact email.
- 6. Click "Contact Phone" input field to update contact phone.
- 7. Click "Invoice Date" input field to update invoice date.
- 8. Click "Purchase Order Number" input field and modify purchase order number.
- 9. Click "+ Add Product/Service" to add more products/services.
- 10. Click "Additional charges" input field and modify additional charges.
- 11. Click "Discount" input field and modify discount amount.
- 12. Click "Update" button.