if(salary > 4500){
            taxSalary = taxSalary + (salary-4500)*0.28;
            salary = 4500;
        }
        if (salary > 3000 && salary <= 4500){
            taxSalary = taxSalary + (salary-3000)*0.18;
            salary = 3000;
        }
        if (salary > 2000 && salary <= 3000){
            taxSalary = taxSalary + (salary-2000)*0.08;
            salary = 2000;
        }