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Migration with Parallel Accounting 
This section sets out from the assumption that you use several accounting principles in General Ledger Accounting for external reporting and that you are migrating to New General Ledger Accounting from a scenario with parallel accounting.
In New General Ledger Accounting, you have a choice between two options for portraying parallel accounting: the account approach and the ledger approach. For more information, see SAP Note 779251.
You have devised a concept for portraying parallel accounting.
The following points are not supported for the migration in the standard system:
● New implementation of parallel valuation
● New implementation of segment reporting
● Migration of a company code approach
You need to perform this as part of a project solution.
● Change to chart of accounts or conversion of chart of accounts
For this, use a service within System Landscape Optimization (SLO).
● Simultaneous changeover of the leading depreciation area in Asset Accounting (FI-AA)
For this, use a service within System Landscape Optimization (SLO).

Migration with parallel accounting is often coupled with the question relating to migration to a scenario with document splitting. For more information, see Migration with Document Splitting. This section deals exclusively with parallel accounting.
