Right of representative assessee to recover tax paid

305. (1) Every representative assessee who, as such, pays any sum under this Act, shall be entitled to recover the sum so paid from the person on whose behalf it is paid, or to retain out of any moneys that may be in his possession or may come to him in his representative capacity, an amount equal to the sum so paid. (2) Any representative assessee, or any person who apprehends that he may be assessed as a representative assessee, may retain out of any money payable by him to the person on whose behalf he is liable to pay tax (hereinafter in this section 306 referred to as the principal), a sum equal to his estimated liability under this Chapter. (3) In the event of any disagreement between such principal and such represen - tative assessee or person with regard to the amount to be so retained as referred to in sub-section (2), such representative assessee or person may secure from the Assessing Officer a certificate stating the amount to be so retained pending final settlement of the liability, and the certificate so obtained shall be his warrant for retaining that amount. (4) The amount recoverable from such representative assessee or person at the time of final settlement shall not exceed the amount specified in such certificate, except to the extent to which such representative assessee or person may at such time have in his hands additional assets of the principal. 3. —Representative assessees—Special cases Who may be regarded as agent.