SAP Note 14763 - Conversion after end of tax concession period

Symptom:

How is the tax concession period defined in SAP Asset Accounting?

Solution
If you want to combine the end of the tax concession period with the end of a financial year, you can do this as follows:
Ensure that the start of the validity period of the calculation key for the ordinary depreciation is set to '3' (from start of special depreciation). This is reached via the function on the detail screen of the calculation key.
This requires that the special depreciation key always uses the annual rule.
Example: Tax concession period 05.00 years, useful life 10.00 years
Start of depreciation normal depreciation: 04.1994,
Start of depreciation special depreciation: 01.1994
End of tax concession period: 12.1998
End of useful life: 03.2003