If you change a timecardA mechanism for logging time against a project or an assignment., milestoneA fixed target, which when achieved, can be billed to the customer for a fixed fee or by logging time against it. or expenseA record of expenses incurred by resources assigned to a project or opportunity. that you have already generated a billing eventA means of generating billing information that can be fed into a financial system for, you can recalculate the amounts in the billing event as long as that billing event has not been released:
The recalculation function corrects the description and amount in the Billing Event Item to sync with the change made to the timecard, milestone, or expense.