Return obligation for commodities transactions requires prescribed filing, notice power for nonfiling, and preassessment revised returns. Recognised associations as assessees must prepare and deliver, within the prescribed time after each financial year, a return in the prescribed form and verified manner detailing all taxable commodities transactions to the Assessing Officer or authorised authority. The Assessing Officer may issue a notice to any assessee who fails to file, requiring submission within a specified time. An assessee who missed the deadline or finds omissions or wrong statements may furnish a return or a revised return at any time before assessment.