How to handle movement in Prior Year Retained Earnings

Summary:

Currently we load the closing balance of the prior year retained earnings account to FCCS_Retained Earnings Prior ->FCCS_ClosingBalance Input.

Occasionally my client has movement in this account, adjustments to prior year retained earnings. However, we have not turned on the default movement for this account as whenever we have tried it does not calculate it correctly. I think this is due to the balance coming from the ERP being in a different place to where the opening balance is calculated in FCC. Have other people successfully done this?

How do other people handle movement in FCCS_Retained Earnings Prior? Is there a recommended way to automate this? Trying to avoid it having to be input manually.