Tds on professional fees

Hi All, I wanted to check how to adjust the excess deduction of TDS on professional fees. We have a consultant to whom we have paid an amount of 30,000, as he was not having the pan card we have deducted 20% of tds. He mentioned that he will apply for the pan card and submit the same before releasing the final payment. can we adjust the tds amount in the final payment after receiving the pan card details?? Please help as this is really urgent. Regards Rajalakshmi