Closing of new partnership firm

Dear Valued Members,

2 partners formed a partnership firm duly notarized by Notary Public on 25th April-17 and applied for Firm PAN card on 26th April-17, PAN allotment is under process at NSDL.

But due to some personal reason both partner want to close the firm and also wanted to surrender PAN card which will be allotted soon.

Please guide the procedure.

Thanks a lot for kind guidance in advance.