public IHttpActionResult Get()
 {
     var vm = new TaxViewModel();
     vm.HandleRequest();
     vm.IsValid = true;
     return Ok(vm);
 }
 // GET: DonorTax/Home
 public ActionResult Index()
 {
     var vm = new TaxViewModel();
     vm.HandleRequest();
     vm.IsValid = true;
     return View(vm);
 }
        public IHttpActionResult Post(TaxViewModel vm)
        {
            vm.IsValid = ModelState.IsValid;
            vm.HandleRequest();

            // NOTE: Must clear the model state in order to bind
            //       the @Html helpers to the new model values
            if (vm.IsValid)
            {
                ModelState.Clear();
            }
            else
            {
                foreach (var item in vm.ValidationErrors)
                {
                    ModelState.AddModelError(item.Key, item.Value);
                }
            }

            return Ok(vm);
        }