I can share some information of what's the significance of the green dot beside your employee's name in QuickBooks Online Payroll, @linda115.
You can use the Who's Working window to know the different statuses of your team members.
Here's how:
You can determine your team member's current status through this:
For more information, you can visit this article: Use the Who's Working window for QuickBooks Time.
Nevertheless, you can visit this article for future reference to learn how to change your employees' information in QuickBooks Online Payroll: Edit or change employee info in payroll.
If you have follow-up questions about managing your employees in QuickBooks Online Payroll, you can post them below. I'll be glad to help.