I need to renew my registration do I need to have an appointment ?

Yes

That’s the problem I haven’t received the renewal form and not easy to do it online with out it

It's better and more convenient to go online at MVC.com and follow the prompts...

Best to renew online if you received a renewal form with an access code.

JohnDoe is correct 👌

You can Renew your registration by mail or online at NJMVC.GOV if you have the form they sent you (your form will have a PIN number at the bottom right side). Or you can go online and schedule an appointment to do it in person.