The migration of transactions & journals from legacy to oracle is the most difficult part of data migration. You should migrate all the GL balance for the current year periods, all the last year periods and the ending balance of ‘Y-2’ to oracle. You need to do a proper reconciliation of GL balances after migration of open AP/AR invoices to the current period.
AP Open Invoice
The charge and tax amounts of the open AP invoices already exist in the legacy system. You need to make sure that you don’t account them again in oracle.
Accounting entries in Legacy
Charge A/C Dr
Tax  A/C Dr                            Supplier Liability A/C Cr
Instead of the liability account use a clearing account(Liability) while transferring the journals to oracle GL. Make the below changes while transferring these journals to oracle GL
Charge A/C Dr
Tax  A/C Dr                           
Migration Clearing A/C (Liability) Cr
When you transfer the AP invoice from legacy to oracle. Use the above migration clearing account as charge/tax/freight A/C
Accounts created in oracle AP
Migration Clearing A/C (charge)
Migration Clearing A/C(tax)                       Supplier Liability A/C Cr
Transfer these accounts from AP to Oracle GL. After posting all these journals in the current period the YTD balance of migration clearing A/C should be zero.
AR Open Invoice
Similar to AP open invoice in AR invoice we use a clearing account (ASSET) instead of the receivable A/C in legacy. The revenue and tax amounts of the open AR invoices exist in the legacy system. You need to make sure that you don’t account them again in oracle.
Accounting entries in Legacy
Receivable A/C Dr
                                    Revenue A/C Cr                           
                                    Tax A/C Cr            
              
Make the below changes while transferring these journals to oracle GL
Migration Clearing A/C (Asset) Dr
                                                             Revenue A/C Cr                           
                                                              Tax A/C Cr     
      
When you transfer the AR invoice from legacy to oracle. Use the above migration clearing account as revenue/tax/freight A/C (use transaction type in auto accounting and put the clearing accounts in transaction type)
Accounts created in oracle AR
Receivable A/C Dr
                                    Migration Clearing A/C (Revenue) Cr                           
                                     Migration Clearing A/C (Tax) Cr            

Transfer these accounts from AR to Oracle GL. After posting all these journals in the current period the YTD balance of migration clearing A/C should be zero.
Fixed Assets
Transfer all the assets from legacy to oracle with Accumulated depreciation till the current period. Oracle ‘ll not create any depreciation for previous period. System ‘ll create below journal entries when you close & transfer the journals for the first asset period
Addition Journals
Addition Cost A/C Dr.
                                  Addition Cost Clearing A/C  Cr.
All these assets are present in legacy GL and transferred as a part of GL migration. You need to reverse all these journals in current period
Depreciation Journals
System‘ll create the depreciation journals for the current period.
All the past period depreciation & acc. Depreciation amounts are transferred through GL migration.
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