Good day, @Ire Return.

Thanks for sharing the steps that you've made to resolve the issue. 

Can you share with me if you see any error message when connecting your bank to QuickBooks? Any additional info would be helpful for us in providing you the appropriate solution. 

For now, let's try clearing the cache in your regular browser and check if you're able to connect with QuickBooks. 

If the issue persists, you can reach out to our customer support. This way, they can check if there's an issue with your bank and QuickBooks. Then, provide you a fix to resolve your bank reconnection. Here's how you can reach out to them:

Option 1

1. Click the Help icon.
2. Hit the Contact Us button at the bottom. 
3. Enter your concern in the description, then click Let's talk or Continue.
4. Select Get a callback.

Option 2

1. Click the Help menu in the upper-right hand corner.
2. Type in "Talk to a human", then press Enter.
3. Look for I still need a human and click on it.
4. Click Contact Us.
5. Select between Send a message, Schedule an appointment, or Get a callback.

In the meantime, you can manually upload your bank transactions to QuickBooks Online. This way, we can make sure that you'll have the latest available transactions in your bank register.

Once your bank transactions are in, you can now review and categorise them.

Should you have any follow-up questions or concerns, don't hesitate to post again here in the Community or leave a comment on this thread. Take care and have a good one.