If your vehicle was towed from private property or as a result of a police order, you have the right to know where it was taken and to retrieve it during reasonable hours. Most states require towing companies to notify local law enforcement within a set timeframe after a non-consent tow.
You’re entitled to an itemized bill. If you believe a tow was wrongful — inadequate signage, improper procedure — contact your local consumer protection office or a consumer attorney. Regulations vary significantly by state, so knowing your state’s towing laws is worth the few minutes it takes to look them up.