1. Navigate to HR Administration > HR Services > HR Service Configuration.
2. Open the HR service.
3. In the Case creation service config field, open the case creation configuration record.
   Note: To create a new case creation configuration record for the HR service, click the Lookup icon, and then click New.
4. Fill in the fields on the form.
   
5. Click Submit or Update on the case creation service configuration record.
6. Click Update on the HR service form.

https://docs.servicenow.com/bundle/orlando-hr-service-delivery/page/product/human-resources/task/con...