It is mandatory for the applicants to mention the AO code in the PAN application. The AO code under jurisdiction of which the applicant falls, should be selected by the applicant. The applicants are advised to be careful in selection of the AO code. The details given here are as per the information received from the Income Tax Department. For additional information applicants may contact local office of Income Tax Department or call Aaykar Sampark Kendra on 0124-2438000.