How to adust excise amount

Dear Experts,

I have a query regarding Excise duty.

Scenario is like that:

A=A1+A2

Suppose i have created one production BOM in which:

Item A is parent item which is non-excisable.

Item A1 is child item which is excisable.

Item A2 is child item which is non-excisable.

After that i had completed the production process.

Now i want to sale the product, i made the Delivery document but the item which i want to sale is non-excisable i.e. A so it will take non-excisable tax. But my problem is that i want to include excise amont in Delivery of my child item i.e. A1 which is excisable so how i can adjust excise amount while Delivery.