Before setting up different prices per season, make sure you have read this article about how to set up seasons in your Bookinglayer account.
This is an example of how seasons should look once they have been set:
Please note that custom date ranges and titles for your seasons can be selected.
After your seasons have been set, go to
1. Inventory module
2. Click on one of the Inventory Item Sections
3. Create a new product or click on an existing one
4. Select Seasonal pricing
5. Click on Add a rate and set the prices.