How do I create multiple user accounts for our Online QB so that employees that enter sales receipts and invoices don't have full access to the account?

You've come to the right place, @bajaimage. 

Depending on your subscription, you have a limit on how many BIllable users you can have in your account. I've provided more details below:

• QuickBooks Simple Start: One Billable User (Master Admin) and two Accounting Firms.
• QuickBooks Essentials: Three Billable Users and two Accounting Firms.
• QuickBooks Plus: Five Billable Users and two Accounting Firms.
• QuickBooks Advanced: Twenty-five Billable Users and three Accounting Firms.

There are four types of Billable Users and two types of Non-Billable Users. Here's a description of each type:

• Master Admin: The master admin has access to every feature in QuickBooks Online. Intuit only sends billing reminders to this user's email. There is only one master admin per company. By default, it's the person who set up your QuickBooks Online account.
• Company Admin: A company admin can see and do everything except edit or remove your master admin's access.
• Accounting Firm: You can invite your accountant to your QuickBooks Online company. They'll have the same rights as an admin so you can work together seamlessly.
• Standard User: You can set different levels of access for this user. They can work with customers, sales, vendors, and expenses. These users can enter timesheets, add users, update company info, or manage subscriptions. (There are different levels of access to this type of User.)
• Reports Only User: They can see all reports except the Audit log. They can create custom reports and add report groups, but they can't view the actual transactions. They can't see reports that show payroll or contact info.
• Time Tracking Only User: You can invite employees or vendors as time tracking only users. They can only enter their timesheets. Their only access is to see timesheets and time reports.

This is how you can create users for QuickBooks Online:

1. Go to the Gear icon, then Manage Users.
2. Press Add User.
3. Select the User Type you want to create.
4. Enter your User's name and email address, then hit Save.
5. Your User will quickly get an email. It'll have your business's name and a link that includes Ready to get started? Let's go!. Have your User press the link to finish the process of getting connected to your account.

Let me know if there's anything else I can help you with! Have a safe weekend.