I got my tax bill this weekend, and it stated I owe $3,975 on my. I went to the Government center to appeal, and they showed me NADA data explaining why they will not adjust it. The base price for a 2016 Model X was $80,000 and NADA claims that its resale value has increased to $97,675. This is for the non P model. For the P90D/100D, which is considered another model, the base price was $115,500, but at least it went down to $111,775 according to the NADA resale data. What to do?!!! I wrote to Tesla to encourage them to contact NADA to straighten this out. I think it is ludicrous.