Hi Kirsty,

While we can customise sales forms in QuickBooks Online, customising the delivery note isn't available at this time. You can try saving your delivery note as PDF and look for a PDF editor to edit it.

For more information about delivery note, you can check this article on QuickBooks community page: Can I Create a Delivery Note or Bill of Lading?  https://community.intuit.com/articles/1769621-how-to-create-a-delivery-note-or-delivery-note

I'd recommend sending feedback straight to our Product Development Team. This will help them know where to focus on how to improve the product even better.

Here's how:

Click the Gear icon.
Choose Feedback.

Please do not hesitate to contact us if you require further information and we will gladly help.

Kindest regards