Deductions & credits

Got it so the EV tax credit gets subtracted from the tax liability before the withholding is accounted for not after, so the withholding is refundable even though the tax credit isn’t?
So if I wanted to have to have more money upfront throughout the year since I know the tax credit will cover most of my tax liability, would there be any drawbacks to going exempt for the year, besides having to save $600 on side to pay back?