Profit center issue in document splitting

Hi ,

My client wants to book an invoice in F-02 ,below entries using the document type SB.

Expenses Dr

Customer account Dr

Accrued liablities Dr

Vendor account Cr

In this document splitting is not happening for customer and vendor account We have suggested them to split the invoice into two separate invoices treating vendor and customer in two different invoices. Is there any way to achieve this requirement . please guide.

Regards

Senthilkumar.K