Fill out this form for each seed you have available. Form entries will be compiled into a spreadsheet, where seedsavers can go to find your email address and get in touch.
You can be as brief or detailed as you want, though the more information you provide, the more powerful a tool the spreadsheet becomes for searching/organizing the seed list.
If you have many entries, feel free to edit the Google spreadsheet manually at https://docs.google.com/spreadsheets/d/1Y4OjkTjmyFKKzSSN64R2SG15Oa0vf7tARMhEihyXdHg/edit?usp=sharing
Much of the information on the spreadsheet will appear directly on the website (hiding email addresses) for easy viewing.