Section 16(2)(e) in Bihar Value Added Tax Rules, 2005
(e)If the proportion, expressed as a percentage, of exports during the year to which the input tax credit relates to the aggregate value disposed during the said year is greater than the proportion, expressed as a percentage, of value addition effected to the aggregate value disposed, and the input tax credit, as adjusted by the revised reverse credit, if any, to which he is entitled for the year is more than the output tax for the said year then the dealer shall claim and be allowed a refund, in accordance with the provisions of rule 43, of such excess in the month following the month in which the annual return is filed.