Accounting in sap

Iam not familiar with SAP, my job is to find errors in entries and rectify them. For example- in PT payable GL, an amount of Rs. 10,000 is appearing as payment(dr.), but booking and payment of PT are as per salary sheet. This is clear that amount of rs.10,000 is booked under any other GL, but paid by wrongly debiting PT GL. It is impossible to find booking of that amount in every GL, kindly suggest me any technical method/trick(like looking for any doc. no)to trace the entries.