Welcome to the Community forum, tiffany3. I'm here to lend a hand.
Upon connecting Capital One Credit Card, have you encountered an error message? If you've not seen the Synchronize button upon connection, this means that your bank doesn't support Direct Connect for QuickBooks.
As a workaround, you can import bank transactions to bring into QuickBooks. In your case, since your bank won't let you download the .qbo file, you can search for a converter online.
Once everything is set, you can import the file again to QuickBooks Desktop.
When the download finishes, open the file to install the update. After the install, restart your computer.
You can check the list of Participating Financial Institution to verify if your bank supports Web Connect and/or Direct Connect. Capital One - Credit Cards only supports the web connect method. This is the reason why you're getting the prompt to download the file from your bank.
Go to Banking.
Select Bank Feeds and choose Participating Financial Institutions.
Under the Financial Institution Directory, select your bank.
Check the Supported Download Method.
You can refer to this article to manually download your bank data into the program: Web Connect.
Please let me know if you have other concerns. I'll be around to help.
Thank you for posting here in the Community, @tiffany3.
I appreciate you, performing the suggested steps above. I've also checked our records here. There isn't an ongoing investigation about this issue. I'd recommend contacting our support team to help check on your account. They can also guide you with the steps on how to resolve this issue.
To contact support, here's how:
Go to the Help icon, then select QuickBooks Desktop Help.
Click Contact Us at the bottom.
Choose among the option on how you would like to contact support.
I also include these articles that can help you fix banking errors: