Want change Credit Note mail format.

Thanks for posting in the Community, @nigil.

In QuickBooks Online (QBO), the option to change the Credit Note email format is currently unavailable. The form style follows the style used in the standard invoice template. Refer to this article for more insights: Email and customise sales form.

I can see how this option would be helpful for you, and I'll take note of this. Our Product Engineers are always looking for ideas to improve QBO.

In the meantime, I recommend visiting our Blog site. This is where we share recent happenings and future developments, such as updates to newly added features. Here's the link: https://quickbooks.intuit.com/blog/.

For tips and other resources, you may check our website for reference: Self-help articles.

Please leave a comment below if you have any additional questions. I'll be here to help. Have a wonderful day!