IDOC E1EDP26 new segment 003

Good morning Gurus,

I have a requirement in which I must add a new segment 003 in E1EDP26. I was searching online a lot of info and I set a breakpoint in the following exits

EXIT_SAPLIEDI_111

EXIT_SAPLIEDI_112

EXIT_SAPLVEDF_002

My idoc is Inbound so I guess EXIT_SAPLVEDF_002 is not working for it.

I was trying to debug it in WE19, inbound function module -> debugging and it stops in iDOC_INPUT_INVOIC_MM but no to the user exits I was mentioning.

Can you please help me to know how I can do it to add the segment, any new user exits or enhacement.

Regards,

David