Hi Parag,
start transaction AFAMA, double click the depreciation key, you want to change to and there is a checkbox 'Dep. to the day'. Tick that checkbox and the depreciation will be calculated day wise.
Brief information about Dep. cal. to day is as follows,
Depreciation calculation to exact day
Specifies that the system calculates depreciation to the day.
Use
Any period control methods entered in the depreciation key are ignored for the entire useful life of the asset. This applies to all transactions (acquisitions, retirements, and transfers). The system always uses the asset value date as the depreciation start date.
The "depreciation to the day" function becomes active for an asset as soon as the asset has a corresponding depreciation key and the asset is capitalized (posted to). Once this takes place, it is no longer possible to switch off this function for the asset, even if you change the depreciation key. On the other hand, it is not possible to activate this function for an asset after it has already been capitalized using a different depreciation key.
Hope this will help you.
Kindly test scenario in Dev. client first.
Regards,
Dhruval Vaishnav.