I had a PAN card say ABCDE1234X in which my DOB was incorrect but still i filled my IT returns for two years with the same PAN card. After two years i raised request to correct DOB details and they rather than rectifying the older PAN card number, dispatched a PAN card with new PAN number ABCDE6789Z. Now I updated my PAN card in bank accounts and this year i submitted my IT returns with new PAN card number. Is there anything else i have to do because of this change in my PAN card ? I have doubts because my past two IT returns are from old PAN card and new IT return from new PAN card.