I'd push back on that and dispute it.
From the RTA FAQ:
The only time the selling price should be used is when the MSRP isn't available, and they specifically list that all owners of the same "model" of car should pay the same, and purchase price doesn't do that. There's no reason they shouldn't be using the $35,000 MSRP of the car for this tax, and it should never factor in delivery price. They had no issue with my Model X using the $95,500 MSRP instead of the purchase price with options + delivery.
One possibility is that what you paid is what Tesla charged you so far, but you often get a check back after purchase for over-payment. Has Tesla settled that yet?
Thank you, I pick up car tomorrow. I was basing my comment off of the purchase agreement.
Total Cash Price
A. Cash price of motor vehicle, options, accessories and fees.
(See attached Vehicle Configuration for itemization.) $ 59,000.00 (A)
B. Less Tesla Vehicle Trade-In (see Trade-in Annex) $ 5,800.00 (B)
C. Other $ (C)
D. Other $ (D)
E. Subtotal of Taxable Items (A through D) $ 53,200.00 (E)
F. Sales Tax $ 2,204.80 (F)
G. Lien Balance due on Trade-in $ 0.00 (G)
Total Cash Price (E through G) $ 55,404.80 (1)
2. Amounts Paid to Government Agencies*
A. Registration/Transfer/Titling Fees $ 125.75 (A)
B. Vehicle License Fees $ 0.00 (B)
C. Other RTA County Fee $ 649.00 (C)
D. Other $ 0.00 (D)
Total Government Fees (A through D) $ 774.75 (2)
3. Subtotal (1 through 2) $ 56,179.55
Also looks like the charged me sales tax based on Seattle 10.1% rather than Shoreline 10% where I live. Ill mention it, I assume I'll get some cash back like you suggest.