1) The easiest and least expensive way is to use of a chemical dechlorinating product, but choose one carefully, because not all tap water conditioners or dechlorinators are the same. Read product labels closely, and if a product states that it removes chlorine and chloramines, but has no mention of ammonia, beware. Products such as these are designed to break the chloramine bond, separating the ammonia from the chlorine, at which point the chlorine is eliminated, but the released associated toxic ammonia remains in the water. Again, read labels carefully. In all likelihood a product like this will also state that an additional brand name ammonia eliminating or detoxifying product should be used at the same time. The simplest solution to this problem is to buy a complete three-in-one chlorine, chloramines and ammonia treatment tap water conditioner. Shop and compare prices on top choice tap water conditioners recommended as some of the best we have used, both professionally and personally.
2) Install and filter the tap water through an RO (Reverse Osmosis) unit, but make sure it is a quality model that is designed to remove chlorine, chloramines, and ammonia.
3) A simple faucet or under the counter tap water drinking carbon type filter can be used, but the unit must contain high quality carbon, and unless the water is allowed sufficient contact time, it may not be completely effective. Also, chloramines can exhaust carbon much faster than chlorine alone, and therefore filter cartridges need to be replaced more often. Buying a tap water filter that has an indicator that tells you when it's time to change the cartridge is a good investment here.