Can l walk in to day to register my car and what location dmv take a walk in.

You must have an appointment, they will check to see if you are on the list, prior to letting you inside. My daughter took her driving test and they only allowed her to go inside, I had to wait outside the building.

You need an appointment however if it's a renewal you can use their Kiosk at all locations

My understanding from a few weeks ago when I visited, was that they only take a limited number of walk ins on Saturdays early in the day. The rest of the week you can only make an appointment. N. Decatur location.