Texas sales tax affidavit for a motor vehicle

Effective October 1, 2006: State law changes the method to calculate motor vehicle sales and use tax due when you buy a used vehicle. The tax will continue to be due when you title and register the vehicle at the county tax office. A purchaser must pay the tax within 30 calendar days from the date of purchase or the date the vehicle was brought into Texas for use to avoid penalties. Estimate Tax Calculation For Buying A Used Motor Vehicle: