Hello, I am able to complete the steps you mention up to downloading the transactions from my external bank.  

However, then I get a pop-up box in QuickBooks that says:

"Select a Bank Account.  QuickBooks does not have an online account to handle these transactions.  Please make a selection below.

Use an existing QuickBooks account.

Create a new QuickBooks account."

However, I already have a QuickBooks bank account set up with online access that I have been downloading transactions to for 2 years.  But that QuickBooks bank account is not an available option under "Use an existing QuickBooks account".

Please advise.