I have applied TAN application for "District Health Society Majuli" on line and the seal with signed by authorized signatory on the printed acknowledge copy was send with DD of Rs.65/- in favour of NSDL-TIN payable at Mumbai. But NSDL mailed that the documents reached but documents are invalid. I have trying to contact the customer call centre but which is not in service due to Covid-19.
Guide me what I have to do to get the TAN no. which is required urgent basis.