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Posting to Accounting (PY-XX-DT) 
Purpose
The payroll results contain information that is relevant for Accounting. For this reason, they must be evaluated for posting to Accounting. The Posting to Accounting component performs this task. It is the interface between Payroll and Accounting. It helps to:
Integration
Various components of the R/3 system interact when posting to Accounting:
Payroll (PY)
The Payroll component creates payroll results for each payroll period. To do so,
wage types with different business purposes are created. They are created according to tax, social insurance law, industrial law, pay scale and operative points of view.Financial Accounting (FI)
Financial Accounting
illustrates all business transactions in the enterprise using postings to the relevant accounts. Posting to Accounting provides the necessary data for the following components in Financial Accounting:Cost Accounting (CO)
Cost Accounting
provides information on the relationship between costs and activities within the enterprise. To do so, costs are either assigned to a cost center or to another account assignment object. The posting to Accounting component usually posts to the following account assignment objects:It is also possible to post to the following account assignment objects:
Personnel Cost Planning (PA-CM-CP)
The system can provide Personnel Cost Planning with data based on simulated or actual payroll results from posting to Accounting
The graphic shows how the components link together when posting to Accounting

Implementation Considerations
The components involved in posting to Accounting do not have to be in the same client in the R/3 system. If the components involved are in different R/3 systems, R/2 systems or third-party systems, you can find more information in the following sections:
Posting Posting Documents
Scope of Function
Archiving Posting Documents (PY-XX-DT) and
Archiving Index Files (PY-XX-DT).