I am getting an error message when connecting my NatWest bank account. Has anyone had anything similar?

Hi, Tallulah. We can try to log in to a private browser to see if the issue is cache-related. Let's explore your options and see why this is happening.

Open and link your account again using a private browser or an incognito window on your QBO account. Based on your browser type, please refer to the keyboard shortcuts below:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Shift + N

To isolate the issue, can you specify any error message that shows up when you submit the request? This will help us pinpoint the solution. You can also refer to this article that contains some common bank connection errors with their respective solutions: Fix bank connection errors in QuickBooks.

If you've successfully linked your account to QBO, you can refer to these article for future reference in categorising your transactions: Categorise bank transactions in QuickBooks Sole Trader.
 

We'll be in the comment section of this thread if you need further assistance.