Get your taxes done using TurboTax

The solar panel tax credit allows filers to take a tax credit equal to up to 30% of eligible costs. There is no income limit to qualify, and you can claim the credit each year you're eligible for it. 

I'm not sure why there would be a $30 difference. Make sure you numbers are entered properly in TurboTax. I entered it in my program and it calculated $6,380.