How do I make sending sales forms (invoices) via the mobile app use the same email as when I do it via web?I use a custom Gmail but it sends via the QB email on the app

The ability to customize the email address used for sending invoices using Gmail is only available through the QuickBooks Online web browser interface, Daniel. 

We value your feedback and would like to submit your suggestion to our product engineering team. Your input could be key in developing a feature that enhances the invoicing process for you and other users.

To share your feedback, please follow these steps: 
 

1. Click on the Gear icon located in the upper right corner.
2. Select Feedback under the Your Company section. 
   
3. In the feedback form, enter your comments regarding the customization of the email address feature. 
4. Finally, click Next to submit your feedback to our team.

You can personalise your invoices or sales form in QuickBooks Online. These can help you ensure your documents reflect your business's unique branding.

If you require assistance, please do not hesitate to visit the Community. We look forward to providing you with support once again.