You have to log onto your account to renew your membership.
If you have forgotten your password use the "Forgot Login" link under the Login button or just click here and the site will help you reset your password.
Once logged in use the Your Account menu item and click on the Join/Renew tab to see your current membership status and renewal possibilities.
If you renew a current membership at the same level it will be applied to the next year. If you want to change membership level you should renew after October 1st, otherwise you will generate a new membership.