Welcome to the QuickBooks Commuinity, userbridewoodfarm.

Thanks for reaching out to us here. I'd be happy to provide some information.

Due to app limitation, price rules are only applied to invoices when using the QuickBooks Online web browser. I can see how being able to have price rules added to invoices while using the app would be beneficial for you, so I recommend leaving feedback by heading to the "Gear" icon and selecting the Feedback option. These comments are viewed and considered by our developers as they create new features and updates for QuickBooks.

Please don't hesitate to reach back out if you have any other questions, Im here to help!