the amount of the credit depends on the vehicle. there are many criteria that must be met to qualify. in other words, not every EV will qualify for the credit and some nothing at all or a lower credit. so, make sure you ask the dealer before purchasing.
in your situation line 18 and line 22 may be the same but technically its line 18 reduced by certain credits
from Schedule 3 (Form 1040), lines 1 through 4, 6d, 6e, and 6I; and Form 5695, line 30.
you may want to read the IRS guidance for vehicles purchase in 2023
https://www.irs.gov/credits-deductions/credits-for-new-clean-vehicles-purchased-in-2023-or-after
also note that the standard deduction for 2023 is increasing by about $2000 so if your AGI remains about the same your taxable income will drop to $46,000 and the tax would be about $5k.
