Much awaited Excise Module has been integrated by the Tally solutions with its tally.erp module which should be appreciated.otherwise, Tally users have to purchase it separately at a cost ranging
Use voucher class for posting entries in tally.for auto duty calculation voucher class, you should create an item with duty details of excise,vat etc. learn how to create such an item ledger with excise, Cess,S.H.E. and vat duty