The prescribed authority shall refund to a person the amount of tax, penalty, interest and fees (if any) paid by such person in excess of the amount due from him. The refund may be made either by cash payment or, at the option of such person, by deduction of such excess from the amount of tax, penalty; interest and fee due from him:

Provided that such excess amount shall first be adjusted towards the recovery of any amount due from an employer under the Act or from a person to whom a certificate of enrolment has been issued, and thereafter the balance amount, if any, shall be refunded.