public IActionResult CalculateIncomeTax(IncomeTaxVM incomeTaxVM) { if (!ModelState.IsValid) { TempData["SaveResult"] = "Error"; return(Redirect("Home/Index")); } var result = _taxCalculatorService.CalculateIncomeTax(incomeTaxVM.Map()); if (result == true) { TempData["SaveResult"] = "Success"; } else { TempData["SaveResult"] = "Error"; } return(Redirect("Home/Index")); }