Refund on inverted duty structure: formula requires net ITC-based computation and defines adjusted turnover criteria. The amendment prescribes a formula for refund on account of inverted duty structure computing maximum refund as a function of turnover of inverted-rated supplies, Net ITC and Adjusted Total Turnover, defines Net ITC as input tax credit availed in the relevant period excluding certain claims, and retains the existing meaning of Adjusted Total Turnover; it also establishes a detailed Consumer Welfare Fund regime with a Standing Committee to administer credits, grants, investments, audits, and compliance measures.