How many accounts may I have access to in the "Essentials" package ??

Hello, skykingmiller-ya. 

For QuickBooks Essentials, we allow up to 3 billable users to access your account and 2 accountant users. 

To know more about the features available in QuickBooks Essentials, please refer to this link: Essentials Pricing and Features. 

You can also visit this page for additional articles to help you set up your QuickBooks Online account: Getting Started for QuickBooks Online. 

You can always get back to the Community if you have to follow-up questions about QuickBooks. I'm just a post away. Have a great day!