Hi Deepak,
The T code S_ALR_87011994 will always show plan values up to the end of the year. But GL account balances will show posted amount only and not the planned amount.
So If you want to compare reports and GL balances use T code S_ALR_87011990 and tick depreciation posted check box in further settings and then compare with GL balances.
Hope it solves.
Regards,
G.Sethuraman