In case of companies which have many stock items and doesn't want to define the Duty to each item when ever there is change in duty (because of budget), can use multi stock duty alteration option available in Tally.ERP 9.
Update Excise Duties
To update the excise duty detail to Pet Bottles - 5Ltr, Pet Bottles - 750ml and Pet Bottles - 500ml
Go to Gateway of Tally > Inventory Info. > Ute Excise Info. > Rate of Duty
Stock Groups: If this destination type is selected, the duty details will get copied to all the stock items created under the selected Stock Group.
Stock Items: If this destination type is selected, the duty details will be copied to the Stock Item selected.
Tariff Classification: If this destination type is selected, the duty details will get copied to all the stock items which fall under the selected Tariff Classification.
Here, Stock Group is selected as the Destination Type
Select Bottles from the List of Groups
Note: The above screen displays the details (Excise Unit Name, valuation Type,Units, etc.) which will copied to the stock items.
Now the stock items created under stock group Bottle would have been updated with the excise duties.