The Qualified Plug-in Electric Drive Motor Vehicle Credit is a non refundable credit. A non refundable credit can reduce your tax liability to 0 (zero), however it cannot result in a refund. What this means is if you qualify for a $350 credit and your tax liability is $200, you will only receive a $200 credit on your return. If your tax liability is zero you would not receive the credit at all, even though you are otherwise eligible for it.