Hi Santi
There are 3 ways in SAP to handle this
1) Specify Cut Off Value key in your Dep Key.. in "Scrap Value" choose Consideration Controlled by Cut Off Value Key
In Cut Off Value Key, you can choose to reduce the Base Amount
2) You can specify the Memo Value at Comp Code level, incase you wanna leave the same scrap value across all assets
3) You can specify the scrap value amount per asset. In AS02, go to the Dep Areas Tab, Double click on your Dep Area and enter a % or Scrap amount there.. you must allow this in Screen layout AO21
Choose any of these 3 options depending on your requirement..
Also, let us know when the asset was capitalized, Dep Start Date.
Br, Ajay M