You did something wrong if you only got a partial credit and turbo tax says you still owe taxes. The credit can bring your tax liability to $0 and the Volt qualifies for the full $7500. I would double check everything before filing.I added my tax credit through TurboTax, but it only allowed me $6,299 of the possible $7,500. Still owe $1,315 in federal taxes. Was hoping I would get the full $7,500, but $6,299 isn't bad!