When we have TAN No. and verify the same why should the site ask for category of deductor , State etc. details. The TAN No. is only one in the entire India - Is it not ridiculous ask for these details.
Of course when we search for TAN No. as per name then also asking for category is meaningless. Because most the Govt. Organisations (including bank branches) say that they are autonomous organisations.
So it can give an option to search whether we want advanced search ... then category wise or state wise , district wise and OR Category wise.