Hi, I wish to create digital signature with company stamp. I wonder able to do for e-invoice?

Thanks for reaching out to the Community, @steven.lim.

The option to add a digital signature with a company stamp on invoices is currently unavailable in QuickBooks Online (QBO). I'll take note of this suggestion. Our Product Engineers are always looking for ideas from users on how 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/.

You can also check out this article for more information about managing invoices in QBO: Create and send an invoice.

Please know that I'm only a few clicks away if you have any other questions or concerns. I'll be here to help. Have a good one!

@steven.lim 

You may need two 3rd party apps to do so.