Tesla continues to improve - with significantly reduced maintenance costs! I went in for a 2 year maintenance, and they did the needed work for about half the cost of the old $725 2-year service. What a deal!
If you have a pre-paid maintenance plan, you have the option to continue with the old plan, but save money and just do the new recommended maintenance, or none at all if you like to live dangerously
With a couple of clicks - Your Account -> Manage, go down to your plan and click on refund. Couldn't be easier.