Hi there. @hadcat.
Let me help share some information about your concern on how to add or remove vendor favorites in app.
I can see how this option would be helpful for you and your business. Therefore, let me take note of this as a suggestion to improve your QuickBooks experience.
If you haven't sent anything yet, I'd recommend doing so. That way, our developers could review your request and most likely include them in our future updates. Here's how to send feedback:
I'd suggest sending your feedback to this link: http://feedback.qbo.intuit.com.
Our Product Development Team visits this section regularly to ensure we're delivering on what our customers need.
If you have any other concerns, feedback, or questions, don't hesitate and come back to the Community. I'm always here to help you. Have a great day.