problem when calculating both excise and VAT

Hi Experts,

I have made all the setups for both VAT and Excise and created a structure including these two.

And i have added that structure to a purchase order. The problem what iam getting is only excise amount is getting calculated but VAT amount is not showing.

My Requirement is :

  1. I want VAT to be calculated base on both invoice and BED value.

For Example,

Total item values : 1000

Excise 8% : 80

Total is 1080

Vat 4% to be calculated on 1080 but not on 1000

In the structure define calculation as +1 for sales tax line

sorry sundeep its not working wat to do now