Composition scheme rate reduced for manufacturers and suppliers; substitutes lower tax rate and limits turnover basis to taxable goods. Amends Notification No. 1142-F.T. by substituting in clause (i) the words 'one per cent.' with 'half per cent.' and in clause (iii) replacing 'half per cent. of the turnover' with 'half per cent. of the turnover of taxable supplies of goods'; the amendment is effective from the first day of January, 2018 under powers conferred by sub-section (1) of section 10 of the West Bengal Goods and Services Tax Act, 2017.