const taxCalculator = () => {
  const salaryType = document.getElementById(‘salary-type’).value;
  const salaryAmount = parseFloat(document.getElementById(‘salary-amount’).value);
  const taxRate = 0; // default tax rate
  const taxableIncome = salaryAmount;
 
  // apply tax rates based on the selected year and salary amount
  if (salaryType === ‘annual’ && taxableIncome > 600000) {
    // apply tax rates for annual salary
  } else if (salaryType === ‘monthly’ && taxableIncome > 50000) {
    // apply tax rates for monthly salary
  }
 
  const taxLiability = taxableIncome * taxRate;
 
  document.getElementById(‘tax-result’).innerHTML = `Your tax liability is: Rs. ${taxLiability.toFixed(2)}`;
};

document.getElementById(‘check-tax’).addEventListener(‘click’, taxCalculator);

HTML

<div id=”tax-calculator”>
  <select id=”salary-type”>
    <option value=”monthly”>Monthly Salary</option>
    <option value=”annual”>Annual Salary</option>
  </select>
  <input type=”number” id=”salary-amount” placeholder=”Enter salary amount”>
  <button id=”check-tax”>Check Tax</button>
  <div id=”tax-result”></div>
</div>