Hi friends, as given in the question, asset it carried at its Scrap value. when it has already reached its residual value, what amount of further dep will u w/off to P/l A/c? scrap value is not dependent on life of the asset. It is the estimated amount to be realised when the asset is finally disposed off at the end of its useful life. say, if the asset is of Rs. 1,00,000 and RV is 10,000 then depreciable amount will be Rs. 90,000 which will be w/off over assets useful life. If u want to make changes in the useful life then also it will not affect the amount of dep. now (AS 6), as this change is prospective and assets has already been fully depreciated. If u feel that the scrap value was not proprly estimated then revalue the asset (AS10).
Regards, CA Shakuntala Chhangani