There has been lengthy discussions about this.
Putting a car on jackstands may be the worst thing you can do to a car in long term storage. This unloads the suspension in an unnatural way, causing bushings on sway bars and end links to twist out of position.
Protecting the tires is only of minor concern as rubber can come back even after they flatspot. Protecting the suspension is far more important.
If you feel you must put the car up on jackstands, rest the car ON the suspension so that it is compressed. On some cars, getting jackstands under the suspension may be impossible.