I appreciate what you've done so far, tjp. Since you've already contacted your bank about error 570 or 590 and everything seems fine, wait a few hours to see if the issue is resolved.
Bank error 590 or 570 indicates that QuickBooks Online (QBO) failed to connect to your bank account due to an unexpected issue at your bank's end. Here's an article for more details: Fix bank connection errors in QuickBooks.
If the issue persists, I recommend contacting our Live Support Team. They have the necessary tools to securely check your account and create a ticket for investigation if needed.
Here's how:
- Go to the Help menu.
- From the Search tab, select any article.
- Click Contact Us.
- Pick a topic or enter your concern, then select Continue.
- Choose Chat with us or Have us call you.
Furthermore, once you've successfully connected your Starling account, you can check out this article for future reference in managing bank transactions: Categorise online bank transactions in QuickBooks Online.
Please keep us informed if you require further assistance resolving bank-related errors in QBO. Our Community team remains available round the clock to offer support.