I want to officially welcome you to the Community, nhstac.
Let me chime into this conversation so that the employees can view their sick and vacation hours.
At this time, the sick and vacation hours won't show on the Paycheck Detail screen of QuickBooks Workforce. The employees should download the paychecks to view the PTO balance.
I'm happy to show you how:
The above steps should let the employees see their available vacation hours.
I'm including an article for future reference: Set up online pay stub access for employees.
That information should get you on the right track. Let me know the results after trying the steps above. I'm always here to provide any additional assistance if you need anything else. Have a good one.