How to set default Tax code for an Item

Hi,

I am trying to add an sales invoice and i got the error "-Cannot create standalone AP/AR Invoice and AP/AR Credit Memo with Excisable item(s)" then i went to that ITEM master data and i removed the check in Excisable check box. After that when i tried to Add new Sales invoice i am getting new error like "- There are Non-excisable Item(s) with CENVAT tax code "

Here one thing that when i am adding sales invoice while i selected the ITEM by default it is taking Tax code as BED+VAT but when i change that code to CST 4% it is accepting. So i want to Make CST 4% as my default Tax code for the ITEM. Please any one provide me the necessary steps so that i can make CST 4% as default Tax code when i added the ITEM in INVOICE.

Edited by: raj16785 on Jul 27, 2010 3:40 PM