Refer the below-mentioned path to view the resigned employees master data.

Go to Employees menu >> click on Settings icon next to add employee >> tick Include Inactive

Once the same is done, please search the employee in employee master and click on view/edit

Note: While creating a new employee record with previous master data, if you want to update the same details like PAN, AADHAAR, PF&ESI details etc, kindly update the dummy details in employee old record.