You can go to mydmv.org for an address update, that is a free online service
Yes you do. Right now, you pretty much need an appointment for everything at the DMV. I would recommend doing that online, I did an address change for my driver's license last week online and it was quick. If you make an appointment right now, you might be waiting until June at best. A few days ago, a family member of mine made an appointment for June 10th because that was the closest day they had.
No walk-in
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