If you buy an electric drive car, you may qualify for a tax credit of up to $7,500. However, the credit is reduced once the manufacturer has sold more than 200,000 cars in the U.S. Tesla reported that it reached this milestone for electric vehicles (EVs) in July 2018. What this means (https://www.tesla.com/support/incentives) :
Note: GM is expected to surpass the 200,000 vehicle threshold later in 2018. The credit drops to 50% of the full limit in the second quarter after the quarter in which this threshold is attained, so if it isn’t achieved until December (the fourth quarter of 2018), the credit reduction would not start until the second quarter of 2019.
A sale of property that allows for tax deferment if at least one payment is received after the end of the tax year in which the sale occurs. The installment method does not apply to year-end sales of publicly traded securities. Dealers may not use the installment method. Investors with very large installment balances could face a special tax.