Mizoram GST rules amend valuation, input tax credit, invoicing, returns, refunds and electronic compliance procedures. Amendment prescribes sequential methods for determination of value of supply including open market, known monetary equivalents, like-kind comparisons, cost-plus and residual methods; sets valuation for special supplies (currency exchange, travel booking, life insurance, second hand goods, vouchers, pure agents), defines exchange rate and tax-inclusive value extraction formula, and establishes comprehensive input tax credit rules, invoicing, returns, matching, refund, transitional, assessment, audit, advance ruling and practitioner procedures with prescribed forms and electronic processes.