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Processing Extended Account
Settlement 
You specify the time and frequency (time periods) of an account settlement on the Extended Settlement tab page in the Time Periods group box for each settlement track of an account. Extended account settlements are normally run during end-of-day processing.
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1. In the General Data group box, specify whether the system is to calculate capital yield tax for the settlement results in the basic track.
2. Select the settlement tracks one after another, and define their settlement behavior.
3. Select the settlement tracks one after another, and specify in the Time Periods group box the frequency with which the account settlement is to be run for this settlement track. Note that the frequency is based on the starting date you specify. The date of the next account settlement must be in the future.
4. If you want the system to post the results to reference accounts instead of the settled account, you need to specify reference accounts on the Payment Details tab page for each condition type for which settlement results are to be calculated.

To specify payment details for posting settlement results to reference accounts, you need to define payment detail types, and assign these to posting types. You do this in the Customizing for Account Management under Product Management ® Settlement ® Define Payment Detail Types for Settlement Postings.
The system runs the extended settlement on the dates that you specified, and posts the results according to the settings you entered on the Payment Details tab page.