Voucher class are great tools in tally for speedy and error free entry in tally.one such great voucher class is auto duty calculation by which you can set up duty calculation for sales and purchase voucher to avoid any mistake in voucher entry
tally 7.2 is now no more supported by tally solutions. here is an attempts to help tally 7.2 for entering vat, cst and excise in tally 7.2
its an old post and due to new release of tally.erp 9, this post become outdated. better to download latest version of tally