Group Reporting Migration Strategy

[MFRITSCHE]

Hello,

I am seeking some advice on the Migration Strategy for Group Reporting in S/4HANA Cloud. Our customer will go live with S/4HANA 01/2025. 

From my understanding, we will migrate year-end balances 12/2024 into GR with the flexible upload template and do the balance carryforward in GR to period 000. After that, we can integrate the movements from ACDOCA into ACDOCU.

But what happens if our customers still has to perform year end-posting in period 13-16? Can we retrospectively post these transactions into the GR and perform the carryforward again? 

OR

Are we going live once the annual financial statements have been audited and, in the meantime, upload the monthly transactions using the flexible upload?

Thanks a lot in advance!