EKKN-Account Assignment fields to be added to ME28

Hello,

Can anybody tell PO account assignment (WBS) field to be added in ME28.

Has any BADI/USER EXIT for adding one more column in ME28.Because release stratgy on header level and account assignment is on item level (that to item level account assignment in saving on EKKN,

Thanks for your advance help.

Thanks & Regards,

Srinivas.