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Editing Account Settlements 
On the Settlement tab page in the Time Periods group box, specify the time and frequency (time periods) at which you want account settlements to be executed for an account. Account settlements are generally run during end-of-day processing.
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1. In the Time Periods group box, define the frequency (time periods) at which you want the account settlement to be executed. Note that the frequency is based on the starting date you specify. The date of the next account settlement must be in the future.
If you choose the characteristic value Months or Years for the period unit and a working day shift of 0 – no working day shift, then you can make an entry in the additional Key Date = Working Day field.
2. In the Indicators group box, specify whether you want the system to calculate capital yield tax for the settlement results, to post the settlement result, and if so, to post the settlement results individually or as a total.
3. 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.
4. Select an effective interest rate calculation method if required. For more information, see Execute Effective Interest Calculation.
5. Select a condition type offset method if required. For more information, see Execute Condition Type Offset.
The system executes the account settlement on the dates that you specified, and posts the results according to the settings you entered on the Payment Details tab page.