Bank Feeds for Corporate Credit Card with sub accounts

I appreciate you for posting detailed information about your banking concerns, @Oatmo. 

The best way to match the transactions from the sub-accounts is to determine whether the transactions download to one account or to the individual accounts. 

Here's a tip: Connect only the parent account if the transactions download to one account. Connect the subaccounts rather than the parent account if the transactions download to individual accounts.

In your case where your credit card account has multiple cards associated with it, you'll need to setup a parent account, and then have each card set up underneath as a subaccount. 

Here's how to create a subaccount:

1. Go to Settings menu, then select Chart of accounts.
2. Click New. 
3. Depending on your account view, you’ll either see a panel labeled New account or New category.

To continue, you can visit this article to follow the steps according to what panel label you have: Create subaccounts in your chart of accounts in QuickBooks Online.

For future reference, follow and bookmark these links for a step-by-step guide of matching your transactions in QuickBooks, and compare it with your actual bank statements:

•  Review and categorize your transactions
•  How to reconcile accounts 

I'll be right here if you need more help matching your transactions from the sub-accounts. Take care!

Unfortunately, American Express does not appear to have the option to download the individual cards to sub-accounts. That's the root of my problem.