Good day, ericgillet.

I'd like to verify if the other accounts are sub-accounts.

When syncing them in QuickBooks Online, we only need to connect the account which Bank of America bank sends the transactions. If all transactions reflect only in Reward 9668, this is the only account you need to connect into QuickBooks.

We can only link one account, either the parent or the sub-account. Please refer to this article about bank or credit card sub-account setup.

I want to share this article for your guide in reconciling accounts in QuickBooks Online.

Please comment to this thread anytime. I'm looking forward to assisting you again.