Hello there, @amanda-pmifargo-.
We can pull up the Employee Details report to view the full SSN of your employees.
Here's how:
1. Go to the Reports menu.
2. In the search bar type Employee Details.

I'm adding this article for your reference: Set up online pay stub access for employees.
Additionally, here's an article that answers the most frequently asked questions about QuickBooks Workforce: View your paychecks and W-2s. It also includes topics about changing account details such as email address, password, and W-4 to name a few.
Please let me know if you have any other concerns about QuickBooks. Remember, we're here to help you if you need further assistance related to QuickBooks. Stay safe!