Currently, the QuickBooks Online (QBO) mobile app for Android is optimised to display transaction forms, such as invoices, in portrait orientation. This is a design specification of the app, and there is not yet a toggle within the app settings to force these screens into landscape mode.
To maintain a landscape display and utilise a more comprehensive view of your invoice details, I recommend accessing QuickBooks through your tablet’s web browser (such as Chrome) rather than the mobile app. You can do this by logging in at qbo.intuit.com.
Please try the browser-based view for your next batch of invoices, as this should provide the professional layout you need to stay productive. If you have any other QuickBooks queries, please reply to this thread. I am here to help