We have a purchase register report for imports process. Here for each scheduling agreement we have a material. For each material we have multiple schedule lines with a unique schedule line number. For import process, for each schedule line certain set of invoices are entered such as cutoms/excise, freight, clearing, material etc. But we are unable to link that for which particular schedule line what set of invoices are entered in the system. (Not able to link the table EKBE, EKET & RSEG other than schedule agreement no. & item. Need a link between schedule line no. & RSEG table).
Is there a possibility of defining such logic that would link the two. How to do that in SAP.