hi Chandra,
Your design is not right. First of all a tax expense cannot be revenue element (cost element type 11). Most of the time the tax accounts are on the balance sheet, are you sure it is on the P&L? If it is on the P&L, then it should be primary cost element (type 1) or cost element type 12 (deductions). Type 12 cost elements behave like primary ones (almost!).
If it is ce type 12: Work with your SD guy to map the condition type in KE4i and see whether it posts
or not.
If it is ce type 1: then
1) OKB9: Add ce type 1 there and tick the PSG box
2) KEi2: Add the cost element to the FI trf structure and map it to the cost element.
Regards,
Dave