Yes, you can reinstate a terminated employee, @ANGELA25. I'm here to walk you through the steps. 

1. Go to Employees from the left menu. 
2. Set the employee view to All Employees. 
3. Select the terminated employee from the list. 
4. In the Employee Details page, scroll down to the bottom and choose Re-Activate Employee.
5. Click Activate to confirm. 

The screenshot below shows you the fourth step. For detailed instructions, check out this article: Re-activating An Employee. 

After that, you can create a pay run to the reactivated employee. Then, click Finalise Pay Run. You can also select Actions to add adjustments to your employee’s earnings.  

If the employee is subject to withholding, you can lodge a pay event with the ATO after you finalised the pay run. To learn more about this process, visit this article: Create and Lodge A Pay Event. 

I'm just a comment away if you need anything else. Have a great rest of your day, @ANGELA25.