I want to remove the discount column from the sales invoice template in BUSYHow can I do that?

It appears that you want to make specific changes to the configuration of discount columns and settings in BUSY. Here are the steps to achieve the changes you mentioned:
 Step 1 :Removing the Discount Column from Standard Invoice Configuration:
 Open the BUSY.
 Go to the "Configuration" menu.
 Select invoice document Printing 
 Choose the voucher type for which you want to remove the discount column (e.g., "Sales Invoice").
 In the Configuration for Sales Invoicewindow, find the Body Configuration section.
 Set the character width of the discount column to 0 to effectively remove it.
 Save your changes.
 Step 2 : Disabling the Discount Feature from Voucher Series Configuration:
 Go to the Configuration menu.
 Select Voucher Series Configuration.
 Choose the voucher series for which you want to disable the discount feature (e.g., "Sales").
 In the Voucher Series Configuration"window, find the Voucher Type Configuration section.
 Locate the voucher type you want to modify (e.g., Sales Invoice).
 Disable the discount feature by unchecking the relevant option 
 Save your changes.
 Step 3 : Removing Columns from Advance Printing Format:
 To remove a column from the advance printing format, you would typically need to modify the report format in BUSY. This can be a more advanced customization, and it's advisable to contact BUSY's support team or a technical expert for assistance..on our Centralised 24X7 helpline number: 8282828282 or 011 40964096. You can also email us your query at support@busy.in.