Dear Experts,
While running the ME21N/ME22N, I want to replicate the following header data to the line items which are available on the the invoice tab ;
1. DP Category
2.Down Payment %
3. DP Date
when user updates the Header DP category,Down Payment %,DP Date or when click the check event
i have tried me_process_po_cust(BADI) &
1. EXIT_SAPMM06E_007 Export Data to Customer Subscreen for Purchasing Document Header (PAI)
but couldn't find solution yet

Please suggest.