Can someone explain to me in English what this credit (Form 8911) does? TurboTax makes it pretty clear that my credit will be zero, but I'm curious about why. Is it because I'm not using it for a business vehicle? Or is it because the installation cost is low ($650)? Or is it because I pay AMT (because I live in a state with high tax rates)? I tried fooling TurboTax into thinking I didn't owe AMT (by telling it my mortgage interest was $150k), but I still didn't get a credit. any thoughts?