How long does it take for a starling bank account to link. It says checking, it's been 15 hours??

Thanks for posting in the Community, @ben-c-mail-com. Let me help you with your Starling bank connection concern.

To help ensure that you receive the best assistance, could you please let me know if this is a reconnection or a new connection? Do you also get a specific error message or code aside from it's been checking it? This way, I can provide the steps to resolve the issue. 

In the meantime, I suggest checking this article: Open Banking connection errors in QuickBooks Online. It's a list of error codes you may encounter when using the open banking connection, along with the troubleshooting steps to resolve them.

Once your bank is connected, the program will automatically download your most recent transactions. From the Banking page, you can now review and categorise them. 

Fill me in if you have any other concerns or follow-up questions about your banking connection. I'm always here to help you out.