My client is doing a mid year data migration.  I have used the following approach in the past and was wondering if this is uncommon approach.

1. Remove all Account Reconciliation indicators :-) 

2. Load TB 2019 into TB Migration Take-on account 

3. Balance Carry Forward 2019

4. Load TB 2020 movements for Balance Sheet and P&L

5. Reverse all reconciliation account balances

6. Activate reconciliation indicators

7. Load all sub-ledgers (A/P, A/R, AA, AUC) into separate migration accounts

8. Load movements

9. Settle AUC

10. Reconcile All  :-) 

Example AP and AR - other ledgers follow similar example:

Austin