Hi Ravi,
If it's GL Line items, then BSIS or FAGLFLEXA.
In case another, you can try
FDT1 : FSCM-TRM
FDD1- Loans Management
FDES: Credit Memo Records
FDM1: Purchase Orders
FDS2: Sales orders
FDFIEP: Vendor/Customer
FDSP: Document Splitting in Treasury
Hope it helps
Gustavo