To set separate stock updation dates in dual vouchers in BUSY, you need to enable the feature by clicking on Administration, Configuration, Features Options, Inventory tab and selecting the option of separate stock updation date in dual vouchers. Then, during voucher entry, when you press enter key on the voucher date, a stock updation date window will appear in which you can specify the stock updation date. Once enabled, all stock related reports will work on the stock updation date rather than the voucher date.