Thanks for reaching out to the Community. I’d like to share some information about changing the auto-generated email when sending transactions in QuickBooks Online.
This option is currently unavailable. All notifications sent using QBO is system generated and cannot be changed by the user.
You can submit feedback to our product developers so we can consider this for future updates. Simply go to the Gear icon at the top and select Feedback.
QBO is a program that’s constantly evolving based largely on feedback provided by users. You may also give your suggestion by going to the following link: QuickBooks Online Feature Requests. I’ll make sure to do the same on my end.
That should do it. We look forward to hearing from you soon. Post again in the Community if you need anything else. I’ll be here to help. Take care!