You can find that information on the online at http://revenue.stlouisco.com/Collection/ppInfo/: Search for your personal property account by name or address, then click on your account.

Your personal property account number is your owner ID. It begins with the letter ‘I’ as in ‘Individual’, followed by numbers.

Please change the default year shown online to the one for which you need the product code, and you will see a detailed listing of your personal property for that year, including the product code for each vehicle.