We have a running live environment for a couple of years now.
Due to business ownership change and/or restructuring, the financial year for the company has changed.
Current: Jan to Dec - 13 periods (with period 13 as adjustment period)
The current Financial Year 2020 has increased to 18 months until June 2021 (i.e. Jan 2020 until Jun 2021).
After that, the Financial Year will be 13 periods again from July 2021 to Jun 2022…. and so on.
I need help on how can this be smoothly implemented.