Error 390 then QB won't let me disconnect my account to reconnect it

Thanks for sharing the error message you’ve received, @ianbuss.

I see the importance of having to sync your bank transactions to your QuickBooks Online (QBO) account. Currently, there’s an open investigation where some users are unable to disconnect and reconnect their bank account. Rest assured our engineering team is looking for ways to fix this as soon as possible.

In the meantime, let’s upload your bank transactions manually in your QBO account. This way, you can still continue to perform your work. Here’s how to import your transactions:

1. Sign in to your bank or credit card website and follow the instructions on how to download transactions to your computer.
2. Review the file size and format (maximum file size is 350 KB, file format supported CSV, QBO, QFX).
3. Then go to the Banking or Transactions menu in your QBO account.
4. Click the Baking tab.
5. Select your bank.
6. Click the Update drop-down menu.
7. Simply click File upload.

You can also use this article for more details in importing your bank transactions: Manually upload transactions into QuickBooks Online.

Also, I recommend getting in touch with our Support team so they can add you to the list of affected users. Once there’s any news and updates available, you’ll be notified via email.

Once all is set, you can now categorise these transactions to easily match them in your QBO account. 

We appreciate your patience as we’re working to resolve this. Please let me know if there’s anything else you need assistant with your bank feeds. I’m just around ready to help.