You can program in as many seasons as you wish.

1. Under 'Tools' select 'Options' then select the 'Seasons' tab.
2. Click the plus + button on the bottom left to create a new Season Description line then add (type) the new season name.
3. Click the 'Post Edit' button on the left to lock in the new season.
4. Now enter the date range into the panels on the right and again 'Post Edit' on the right.

NOTE: Each category will now need to be linked to the new season and a new set of rates set for each category linked.

The Seasons dialog should look like this when finished!

Note the two 'Post Edit' buttons are greyed out indicating that the information in both panels is 'locked in'.