In ACC_DOCUMENT-CHANGE
LOOP AT c_accit ASSIGNING <wa_accit> WHERE rebzg eq 'V'.
<wa_accit>-rebzg = ''.
ENDLOOP.
Then you can see Invoice Ref. in FBL1N is the Document No.
In ACC_DOCUMENT-CHANGE
LOOP AT c_accit ASSIGNING <wa_accit> WHERE rebzg eq 'V'.
<wa_accit>-rebzg = ''.
ENDLOOP.
Then you can see Invoice Ref. in FBL1N is the Document No.