Central excise duty is levied on goods manufactured in India that are included in the Central Excise Tariff Act. The duty is calculated based on the excise rate and assessable value/quantity of goods. Manufacturers can claim a CENVAT credit for the duty paid on inputs to offset their excise duty liability. In Tally, manufacturers must register excise units, create stock items and voucher types, and pass vouchers for purchases, manufacturing, sales, CENVAT adjustments, and duty payments to comply with excise requirements.