Do I need to fix my crowding or overbite before getting veneers? (photos)

Looking at your photos, I would recommend orthodontics first.  This would be a long process, but it would probably give you the best outcome.  Veneers are an option, but considering the severity of your "overbite," you would need some teeth extracted, bridges, and crowns.  Good luck and I hope this helps. Follow me if you have more questions.Sarah Thompson, DMDReal Self 100

Yes, for ideal results I would suggest that you correctly position your teeth via orthodontic treatment first. This will address your deep bite and also improve overall fit and function of your teeth. Once orthodontic treatment is complete you may be able to whiten your teeth and not need porcelain veneers. The time invested in the orthodontic treatment will be worth it over your lifetime. Porcelain veneers may be a quick fix, but not the most ideal solution for your situation. We wish you the best of luck!

in last photo, i can see deep bite . so don't even think for veneers . first go for brace to restore normal occlusion. otherwise in later age more chances of TMD.

First, thanks for posting the photos. They are very helpful. Veneers are meant to be a long term restoration, not something you change regularly and they will be a significant investment. I would highly encourage you to consider orthodontics before having veneers done. Creating a more ideal bite and eliminating the crowding will allow your dentist to be much more conservative when it is time to do your veneers. This may reduce the number of veneers you need to do to create a beautiful smile.