Writing a custom rule to adjust the Closing balance input Movement

Summary:

We have default movement calculation functionality (Calculate Movements) enabled in the system and we are loading closing balances through data management.

Content (required):

We have a requirement to do a change to Closing balance input member value of Retained earnings account before calculating the actual default movement. Our retained earnings value coming from trial balance include Prior year retained earnings value as well. Since prior year retained earnings is auto calculated in the system, we need to deduct that from the TB retained earnings value before calculating default movement.

Is there a way to handle this in the system. 'FCCS_10_After Opening Balance Carry Forward_LocalCurrency' rule will be called after default movement calculation right? Can we do the closing balance input member changes in FCCS_10 rule?