The short answer is YES, they can be filed down to match the other side. However, the amount could be limited by your occlusion. You do not want to compromise the anterior guidance of how your lower jaw moves in relation to your upper. You do not want to compromise that for the long-term health and stability of your teeth.
Many of us do not have a balanced or perfect smile and if our smile is off, often the teeth look a little off. If you feel your veneers are lower on one side. you can have them contoured and adjusted so they will look more even. You want to be happy with your new veneers, Jerian, so have them contoured and when you smile you will like what your see! Your veeners are beautiful!