WASHINGTON (AP) — Starting Jan. 1, many Americans will qualify for a tax credit of up to $7,500 for buying an electric vehicle. The credit, part of changes enacted in the Inflation Reduction Act, is designed to spur EV sales and reduce greenhouse emissions. But a complex web of requirements, including where vehicles and batteries must be manufactured to qualify, is casting doubt on whether anyone can receive the full $7,500 credit next year.