The integration between QuickBooks Online and Anthropic's Claude is currently only available for the US version. This regional restriction is the reason you are encountering the error and being redirected to the US help page.
While this feature isn't fully supported for UK accounts just yet, we are constantly working to expand our tools globally. I recommend checking our blog from time to time for any official announcements regarding its global release.
If you have any other concerns, feel free to leave a comment in the thread.