What state do you live in? What price is the dealer offering?
In the US, if your federal tax liability is $7500 or more for the year, then you can get back $7500 on your federal tax.
State incentives vary.
I live in Colorado. They have an electric car credit up to $6000, whether or not you paid in that amount of taxes to the state.
The formula is this
((MSRP of lowest priced trim - Federal Rebate - "Grants, Credits, or Rebates") x Battery Capacity)) / 100
So for the Nissan Leaf:
($21,300 (base price of Leaf after $7,500 federal credit) X 24kWh)/100 = $5,112 Credit
I got a $3500 rebate from Nissan, so I assume that will further reduce the credit.
Also, it is unclear to me what qualifies for "Grants, Credits, or Rebates". I paid $22,799 (includes $3500 Nissan rebate) for a 2015 Nissan Leaf S with quick charger package, before dealership handling fee, taxes, and $800 in nonsense fees. I don't know yet if my discount from MSRP will factor in.
If based on the price I paid, minus the federal credit, I will be getting $3672 back.
Also, I got such a good deal due to some minor hail damage. There is hardly a Leaf in Denver for sale without it. They are fixing it for free, but there is a back log so it will be a while.