Hello there, smartshoppercity.
You can only have one Intuit account per email. Then, Fiat is right that each account can have different QBO subscriptions, but can only have one for QBSE.
In order to find out if certain emails have an Intuit account, you can check them in camps.
You can also check these articles to learn more about the basics of QBSE and other related tasks:
Keep me posted if you have any other questions about managing your account. I'll be sure to get back to you.