Thanks for reaching out. Having the flexibility to access your QuickBooks Online account through the mobile app and web browser is important. I'll be happy to assist you with this.
Given that you're able to log in through a web browser, it could be an issue with the app platform preventing you to connect via the app. To ensure your app is running the program as designed, I recommend following the troubleshooting steps in this article: Troubleshooting Quick-Start Guide for the QuickBooks Online app
In case the issue persists, please reach out to our tech support team for us to investigate this further. Here's how to reach us.
Phone and Chat: ClickContact Us to learn how to reach phone and chat support.
Schedule a Callback: click (?)Help in the upper right > click Contact Us > explain your situation > click Let's Talk > choose Get a callback (Note: Callback hours are the same as regular phone hours.)
Social Media: Facebook, Twitter, and Instagram from Monday to Friday between 9 a.m. and 8 p.m. ET
I hope this helps! Feel free to stop by any time if you have more questions.
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