If you buy a used car from brother-in-law do pay sales tax?

Whether you need to pay sales tax when buying a used car from a family member (such as your brother-in-law) depends on the specific laws and regulations in your state. It can also vary based on the relationship between the buyer and seller and the nature of the transaction. To ensure accuracy and obtain the most up-to-date information regarding sales tax obligations for used car purchases within your own state's jurisdiction, it's recommended that you refer to your state's department of revenue, taxation, or motor vehicles website or contact them directly.