Hello, @nikkilouiseday. To assist you better, did you encounter any specific error messages when trying to add the second savings account? Additionally, are you adding this as a Parent account or a Subaccount? Any extra details will help us provide a more tailored solution for you.
In the meantime, let's try some troubleshooting steps to resolve the issue. First, try using an incognito window. This helps determine if the problem is caused by stored cache or corrupted browser files. While you're at it, ensure your browser is supported and up-to-date for the best performance and security in QuickBooks Online (QBO).
Next, log into your Barclays online portal to verify that you’ve granted permission for both accounts. Some banks require you to authorize each sub-account individually before they can appear in the QuickBooks list.
Please keep in mind that you cannot connect both a parent account and its subaccounts at the same time. If you try to link both, you’ll receive a message stating the account is already connected. For more details on this process, check out this article: Connect the accounts to Online Banking.
Should you have any other concerns, feel free to reply to this thread.