Composition levy option allows eligible small taxpayers to pay a prescribed rate instead of regular tax, subject to conditions. Composition levy allows a registered person below the turnover threshold to pay tax at a prescribed composition rate instead of regular tax, subject to exclusions (no non taxable goods, no inter State outward supplies, no supplies through e commerce operators collecting tax, and specified notified manufacturers) and conditions. The option lapses when turnover exceeds the threshold; composition taxpayers must not collect tax or claim input tax credit. Ineligible availing of the option exposes the person to tax determination and penalty under the Act's assessment provisions.