I'm here to ensure you can connect your bank to QuickBooks Online, @linda-gillespie-.
Are you getting any error messages when trying to connect your Monzo account? We can perform basic troubleshooting to isolate the issue. Let's try accessing your account through an incognito window to rule out the possibility of a webpage issue. You can refer to these shortcut keys to open an incognito window in all supported browsers:
Chrome: Ctrl+Shift+N
Firefox: Ctrl+Shift+P
Safari: Command+Shift+N
If everything is fine, clear your browser's cache. This way, you can access QuickBooks with a clean slate. Issues like this can be the result of too much historical data stored in your browser. You can also switch to a different supported browser to see if it has something to do with your browser. Once connected, you can categorise transactions on the list.
Keep me posted should you need further assistance with managing your bank activities. I'm always here to help.
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