Hi @arlin_burton,

In general, there is not much distinction between the root account or subaccounts, they are often just treated as accounts.  In this case, you need to give whatever accounts you'll be using with your sis an associated sis_id.  You'll then use the appropriate account sis id, whether it's the root account or a subaccount, as the value for the account_id in your courses csv file.  I hope this makes sense to you, but let us know if you have more questions.

-Chris