How to separate G/L accounts for damaged goods, Poor quality and Scraps in sap

Hi SAP Gurus,

There is one requirement of my client as to separate the G/L accounts of sales returns for Damaged goods, poor quality and scrap. At present sales and returns are happening to the same G/Ls.

Please suggest the possible solutions completely step by step to hit G/Ls separately.

Thanks in advance...

Neel..