Hi Vikash,
Although I don't have experience with Chile tax codes, I think your requirement could be solved using special depreciation.
This can be set up in config in the following areas:
You will want to select the depreciation area(s) to which it applies in OABS.
Check that the calculation sequence is correct in AOBK. I believe in your case, this should be unchecked.
And set up account determination in AO94.
In addition your will also need to config the depreciation key or create a new one to include special tax depreciation with immediate depreciation and acquisition value reduced by special depreciation in AFAMA.
You may also need to look at AFAMR (Base Methods), AFAMP (Period Control Methods) and AFAMS (Multi-Level Methods).
Best regards,
Ron