I appreciate you getting back and providing detailed information about your concern, @usergavincooper50.
Since the issue persists after performing some steps provided by my colleague above, this time, try uninstalling and reinstalling the app to refresh the connection between your app and mobile. Once done, check if everything is now working fine.
However, if the result is the same, I recommend contacting our Customer Care Team. They have the tools to pull up your account to investigate the root of the problem and why the issue keeps appearing.
To reach them, click the ? Help button at the top-right corner and select Contact Us to talk with a live agent. Ensure to review their support hours to know when agents are available.
In the meantime, I suggest opening your account through a web browser to check the status of your invoices.
For future reference, check out this article to learn how to receive invoice payments using the QuickBooks Online app.
You can also check these articles if you need details about customising your forms:
Please don't hesitate to reply if you have other Quickbooks questions. I'll be around for you. Take care, and have a great day ahead.
