(2) It is mandatory for the applicants to mention either their ''Telephone number'' or valid. (a), An applicant will fill Form 49A online and submit the form.(b), If there are any errors, rectify them and re-submit the form. Copy to be kept with application. Tax Invoice cum Acknowledgement receipt of PAN Application (Form 49A). Fill Out the Application: Select the correct form (49A for Indian citizens, 49AA for foreign citizens, or CSF for corrections).