The Aging Analysis shows the length of time that inventory has been in a particular warehouse. The report assumes first in-first out inventory management.
In order to compute the age of a product for the Aging Analysis, we walk through the historical stock backwards subtracting intakes from the current stock until we reach zero. Each intake increases the value of new stock in the corresponding time window.
The aging report is computed based on the historical stock and it won't populate with information immediately after you connected your store to Inventory Planner.
To access the Inventory Aging report, click on Reports in the left menu, then Aging Analysis.