For configuration of the rates for the specific season filters for your resources, please follow these steps:
1) Open the Booking > Resources > Filters page and create the “Dates season filters” for your seasons.
2) Now open the Booking > Resources > Cost and rates page. Click on “Rate” button near each of your resources. Then activate (set specific checkbox as checked) and configure your rate.
If you still have a questions, please create new topic at the support forum here, or contact using the support email directly, because this form is for the Free version.
Kind regards.