In your case, under bite or deep bite not necessary to extract teeth. It will be depends upon your case, sometimes only alignment by jaw expansion, or supra eruption of your posterior or others method will be cured your deep bite. In your age may be skeletal correction would be possible. If required than some times orthognathic surgery will be helpful in your facial appearance.

Hi. As for underbite correction... There's a different treatment plan for each patient. Your case has to thoroughly checked by an orthodontist and then a treatment plan can be made. It's a customised plan for each patient. Whatever be the line of treatment for your underbite correction.. It is definite to bring about a good pleasant change in the facial profile.😊