Click Inventory Management 

From the menu on the left hand side, scroll down to the Management section the choose Seasonal Ordering 

Set each active toggle to the on position for the seasons that will be used. 

Click the calendar icon as shown to set the start and end dates for the season. 

Once the date range is set click Save

Note: Once the date range expires for the season ( in the example above the end date is June 30th) if a new season has not been set for the part number the dealer will have to repeat these steps. If the part also has the non-seasonal min/max already setup, the part number will default to those numbers for the standard min/max option.