If the principal contact is added as an exceptional case in filing (non-resident, foreigner etc.). To remove this limitation, the taxpayer should send a mail to efilinghelpdesk@incometaxindia.gov.in specifying details such as company name, PAN, Date of Incorporation, name of Principal Contact, PAN of the Principal Contact and date of birth of the Principal Contact. Once completed, the exempted details will be removed and the Principal Contact will be able to record the PAN of the added Principal Contact.