We want to change the useful life of an asset from 3 years to 4 years. As soon as I do this, the system reverses depreciation/accumulated depreciation which is not what we want to do. We want the system to apportion the book value at the time of the change over the remaining periods.

IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors: Revised depreciation charge = carrying amount / remaining useful life.

For example, the remaining net value before adjusting the useful life was R35 874.09 as of 2020/10/31, thus this value originally would have been apportioned over the remaining 3 periods ending 2021/01/31, but now should be apportioned over the next 15 periods ending 2022/01/31.

Any advice will be appreciated. Thank you in advance.