Every dealer claiming, -
(i) any deduction from his gross turnover, or
(ii) any part of his taxable turnover to be a sale to Government, or
(iii) any part of the taxable turnover to be liable to tax at concessional rate of tax under this Act,
shall, alongwith the return under sub-section (3) of section 16, furnish to the Assessing Authority, the declaration or the certificate as required under this Act.