How to add a new column of Excise invoice number in FBL5N report?

Dear Experts,

I have to include the column of excise invoice number (J_1IEXCHDR-EXNUM) in the standard report FBL5N.

I know the assignment number in FBL5N report can be referred to J_1IEXCHDR-RDOC.

I have searched many forums and checked threads for this but havent got a proper answer related to an ABAPER's point of view.

So how to achieve this ??

Thanks,

Vishal.