Is there is any option to generate dilivery challan

Hi there, gbtechnosoft11.

Yes, there's an option in QuickBooks Online to generate a delivery challan. I'd suggest going to the Customer's Transaction list page. From there, you can view the details by opening it in the print screen.
 

Here's how:

1. Choose Sales from the left menu.
2. Select the Customers section.
3. Select the customer's name to display a list of their transactions.
4. Select the box next to each invoice or sales receipt for which you want to print a Delivery Challan.
5. Under the Batch actions drop-down arrow, choose Print Delivery Challan.
6. The print preview screen will open so you can select printing options, preview, and print.

Please refer to this article to see common instances and steps to resolve the error delivery server down when trying to send an invoice or estimate: Delivery Errors when trying to email a sales form.

Please know that you're always welcome to post if you have any other questions. I'm always here to assist.