When filling income tax forms, there’s an entry for the Designation of the Assessing Officer and Ward/Circle. This might be irrelevant for you, but if you do need to fill it up here’s how you can get the information.
Click on Services | Know Jurisdiction.
Type in your PAN number.
And you get results like:
Write everything you see here, into that field in the IT return form. For the above you would use
KAR/C/221/1/DCIT/ACIT CIR 8(1)
Hope that helps.