MISSOURI — The process to buy a car in Missouri may be changing later this month. The system used to collect auto sales tax may be streamlined to help cut down on the number of expired temp tags.

For instance, a car that costs $10,000 in the city would be $1,000 in sales tax, which can be a lot for many. But now, Gov. Mike Parson has signed into law a plan to update the state’s vehicle ...