Thanks, but that didn't really answer my question.

I believe I understand how Chase downloads charges to credit card accounts linked in QBO.  Basically, it downloads charges to the individual card sub-accounts.  (I first just linked the card that Chase regards as "primary" - which I'll call card A - to QBO, but the transactions for cards B and C didn't show up.  So I created a parent Chase credit card account with sub-account for the individual cards.)  I've believe I've got the card sub-accounts set up correctly, and the bank balances shown are accurate.  (And I was able to reconcile the credit card statement using the parent credit card account.)

The problem is how to deal with the first month's payment I made on the credit card.  I paid it out of a linked Chase checking account, so that payment debit now shows up in QBO for review.  And the payment debit showed up in the QBO sub-account for card A only.  I need guidance about how to correctly record both transactions, with the result that the payment is properly applied to the respective balances of cards A, B, C and their respective QBO balances are correct.

Please advise.  Thanks.