I'm getting an error message when trying to process a bank transaction using the app. Error message says to try and use my computer?

I appreciate you visiting the forum. It seems that you're having trouble processing bank transactions on your QuickBooks Online app and received an error message prompting you to try again using your computer. I have some information that could be useful in resolving this issue.

You can process bank transactions in your mobile browser rather than within the app. If you use an iPhone, access it through Safari and Chrome or other available mobile browsers for Android. You may see this article for additional information: QuickBooks Online access for mobile devices.

Here's an article that can guide you further in customising your invoice template and sales form delivery method on the mobile app: Customise invoices on the QuickBooks Online mobile app. 

For additional QuickBooks-related concerns, don't hesitate to post them here in the Community. We're always available and willing to lend a hand to your queries. Have a great day ahead.