• Go to Reports > Management Report > Utilities > Multi Editing > Item Master Multi Editing.

• A 'Item Master Multi Editing' window will appear.
• In 'Stock As On', the user will mention the date upto which stock needs to be view.
• In 'Stock Status', the user will select 'Whole'.
• In 'More option', the user will select 'Yes'. 

• A 'More option' window will appear.
• In 'Selected HSN/SAC', the user will select 'Yes'.

• A 'HSN/SAC' window will appear.
• The user will select the HSN of that particular tax rate on which item discount needs to be given.
• Suppose select '123123'. Press 'Enter' key

• A 'More Options For Item Master Multi Editing' window will appear.
• The user will press 'PageDown' key.

• Click on 'Accept'.

• A 'Closing Stock' window will appear.
• The user will press 'Enter' key and select 'All Items'.

• An 'Item Master Multi Editing' window will appear.
• In 'Item Discount %', the user will select 'Yes' and press 'Enter' key.

• In next field, the user will mention the Item Discount %.
• Suppose mention '10%'.

• Then keep pressing 'Enter' key and type 'SURE'.

After following the above steps, the user can set Tax ( HSN ) wise Item Discount in Marg Software .