Hi Rithu,
You can bring the department field itself from the user table on the form, no code is needed. Please follow the below steps and you can achieve this:
1. Open the form layout of the Incident form.
2. Select the assigned to and click on the highlighted icon in the below snipped.
3. Select the department and bring it in the selected box and place is where you department field to be.
4. Save, Now the Assigned to's department field from the user table will come up on the incident form. No fields or script needs to be created.
Note- For security purpose you need to make the department field read only or else modifying the field could modify the data on user table.
Kindly mark my answer as Correct and helpful based on the Impact.
Regards,
Chaitanya
