Whatever your sentiments about the usefulness of a retroactively-applied tax credit toward economic development goals, the Fed has done just that for EV Charging infrastructure installed in 2017. Did you buy an EV? Install a charger at home or work in 2017? Take the credit! Learn more about the extension at this link:

US retroactively extends tax credits for charger installations, electric motorcycles and fuel cell vehicles through end of 2017 (Updated)