Botox on neck wrinkles?

Without photos it is difficult to give an acuate answer. Anterior neck bands caused by  the underlying Platysma often become noticeable  with active gimacing of the mouth\lower face or extension of the neck. Botox or Dysport will decrease the muscle contraction and  banding effect. 
Skin lining  is best improved with skin resurfacing procedures such as skin peels, micro needling, or Fraxel laser. Dermal fillers for skin lining such as Juvederm, Vobella can be injected but more difficutl to get as good results as with skin resurfacing.

Hello,A photo would help to make more specific suggestions.There are some muscles in neck which would cause some concerns, they are vertical particularly around chin and jaw line would be more prominent. Some may call them "Turkey Neck".Some lines come on horizontally and those are more resistant because the skin over time is affected and may need filler, PRP, laser Fraxel to see some improvement.All the Best -- See an Expert Ray Bayati, MD Sacramento Area, California