Car won’t turn off. Says no bus on the bottom where the mileage is.

Hello, "BUS" is a communication network system within the vehicle. If there is a problem with communication - sure, there will be a big problem trying to operate components! The trouble is, it's impossible to know what is happening without performing proper diagnostic testing using a proper diagnostic tool that is capable of interfacing with a vehicle in a way where anything that is seen can be communicated. As a result you need help from a professional. Somebody that has the experience, workshop manuals to refer to, and diagnostic tools to utilize for testing. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops