how to post unplanned depreciaton

Hi

i ahve one asset which changed the useful life. So after the change, the asset should be completed in October. But system is not calculating as per the change in useful life . System calculate a adjustment posting for depreciation in Oct and then calculate the depreciation value of Nov and Dec which is worng so i think it should be completed in Oct. But actually, it will still has depreciation in Nov and Dec as planned . So now i want to do unplanned depreciation to this asset

can i know how can i do it? or else let me knwo the any other ways to do this so

kind regards

Sunitha