HB 1679 -- Sales Tax Exemption for Modifications to Certain Motor Vehicles Sponsor: Meiners This bill specifies that the purchase price for calculating the sales tax of a motor vehicle excludes the cost to modify the vehicle for use by an individual with a disability. The bill clarifies that the sales tax applies only to the sales price paid by the final purchaser and not to any off-invoice discounts or other pricing discounts.Copyright (c) Missouri House of Representatives