Windfalls are assumed to be one-off occurrences.
To schedule a future windfall, either select a single event or you may set timing using the recipient’s future age.
Note: As a best practice we encourage you to use events rather than the recipient's future age for timing. Events give you an easy to identify speaking point on the Let's See charts. Moreover, with a drag and drop, events can be easily moved on the timeline, from either the Time screen or Let's See charts (by clicking Edit Time), rescheduling the windfall.