If the tags are expired by a month or less, you should be able to do this! If you take care of smog first, you should be able to pay for your registration plus the extra fines at the kiosk and get your sticker immediately!
It is likely that if you get paid in the renewal of stickers, and if you have to carry smog check you can not pay at the kiosk you have to do line or make an appointment.
No, it's better fix that at the DMV.
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