Corporate India has pitched for “uniform” rate of corporate tax, further slashing the existing rate of 22 per cent for existing firms and bringing it on par with the 15 per cent tax prescribed for new manufacturing firms.According to Confederation of Indian (CII) the current double rate of taxation creates “inequality”.All corporate tax rates in the country should be converged to 15 per cent over three years from 1 April 2023 and do away with all exemptions and incentives, CII president Vikram Kirloskar suggested to finance minister Nirmala Sitharaman at a pre-Budget meeting on Thursday.