Hi Ratna,
You may take a look at SAP Note:
20254 - INFO: Values from SD not transferred to CO-PA
Please check if the G/L account determined for the variant condition was created in CO with cost element type 11 = "Revenue element" or 12 = "Sales deduction" (the cost element defined for the G/L account is of type '11' or '12').
If so, then it's necessary to define the condition type in KE4I.
Best regards,
Alex