Can I visit the DEQ first if I was not sent a registration renewal form?

Yes. All they need is the vin # and $21

Yes, they scan your VIN and you get a certificate for $21 that you can then take to the DMV.

Yes you can

Absolutely! Probably best, as you must have DEQ to renew your registration. They will provide the paperwork you need to finish the process at DMV.

Yes you can get aform from them to use at DMV.

Yes, they will give you a certificate that you can then take to the DMV

Yes

I bring plates from another state where I should go first to the DMV or the DEQ