Thanks for joining this conversation, @Kahn. 

I'm happy to hear that you're now able to connect Capital One bank account. As for the Capital One Credit Card, were you able to encounter some error message?

I understand the hassle of manually importing bank transactions, and this isn't the impression we want to leave with you. 

In the meantime, you can update the password of your bank account to re-establish the connection. Then, reconnect it in your QuickBooks account.

Here's how:

1. In the left menu, click Banking. 
2. Go to the Banking tab. 
3. Select the bank you want to reconnect, then click the Edit ✎ icon.
4. Pick Edit sign-in info.
5. Enter your new credentials, then select Update.

For additional reference, you can consider checking this article: What to do if bank transactions won’t download or there's a bank error.

You might want to visit this article to know how to match bank transactions in QuickBooks Online: Categorize and match online bank transactions in QuickBooks Online.

Keep me posted if you have any other banking questions. I'm always here to help. Have a great day!