Tesla has delivered 200,000 vehicles in the United States, exceeding the threshold above which federal tax credits for EVs start to phase out, a spokesperson for Tesla said on Thursday—and its website has updated its incentives schedule. Under U.S. federal legislation, buyers of EVs enjoy tax incentives of up to $7,500 per vehicle for a new purchase for use in the United States. This tax credit is available until 200,000 qualified EVs have been sold in the United States by each manufacturer, at which point the credit begins to phase out for…