The decision in Calcutta Discount Co. Ltd in fact, assists the case of the Petitioner rather than the Respondents. In this decision, the Hon’ble Supreme Court has held that it is the duty of the assessee to disclose fully and truly all primary relevant facts and once all primary facts are before the assessing authority, he requires no further assistance by way of disclosure and it is for him to decide what inference of facts can be reasonably drawn and what legal inferences have ultimately to be drawn. However, if there are some reasonable grounds for thinking that there had been underassessment as regards any primary facts which could have a material bearing on question of under-assessment, that would be sufficient to give jurisdiction to the ITO to issue notice for reassessment.