Deductions & credits

My return was rejected the other day. I waited until today when it was promised to be fixed. Now, it's not allowing me to take the full credit. We purchased in November and are therefore entitled to the $1875. TurboTax is only letting me take a little over $400 claiming I have other deductions. Which I don't, because even without the car, I'd still be getting a refund. I'm very confused and am not going to pay $50 just to find an answer to something that seems to be an error on TurboTax's part.