First, you will click on "My Inventory” tab at the top between Catalog and Data Export. On the left-hand side you’ll see all your inventory lists. At the bottom click “Manage Lists” next to the gear symbol.
Then, select “Notifications” you will have to set the notifications up for each inventory list you have if you want to be notified about every list.
Next, set how often you would like to be notified. This will be how often you get an email about your inventory. You can always change this later as well.
Lastly, enter in at what time and day you would like to be notified as well as what you would like to be notified about.