Here is what has been quoted in this forum before
The incremental price difference (IPD) for the Nissan leaf is $12,250, which is higher then they originally posted, so the tax credit should be turning out to be:
$12,250.00(IPD) - $7,500(FTC) = 4,750
$4,750 x 0.85 = $4,038
Your tax credit is...