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The Business Activity column is available if the Include Expenses in Cost Price check box is cleared. Select the business activity which is associated with this expense.
If you need to create a deferral for any expense in the list, select the expense and click Create / Cancel Deferral on the toolbar to invoke the Deferred Expenses dialog box. The icon in the first column indicates that for this item a deferral was already created. To cancel the deferral, click Create / Cancel Deferral on the toolbar and then Cancel Deferral in the dialog box..

The Deferred Expenses dialog box

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