Composition scheme under GST: simplified tax and voluntary registration for small taxpayers below a turnover threshold. The composition/compounding scheme under GST provides simplified tax liability for small traders and small-scale industries by setting an upper gross annual turnover ceiling and a uniform floor tax rate; it permits voluntary GST registration for dealers below the compounding cut-off and pairs turnover-based eligibility with a fixed minimum rate to streamline compliance and delineate the compounding regime from regular GST obligations.