Shipping/billing address

Design help Ecommerce
1

At checkout, the “billing/shipping address the same” check box is ticked as a default. How do I change the default condition to unchecked?

2

give the checkout box a class of .checkout-checkbox

<script>
document.addEventListener("DOMContentLoaded", function() {
  var checkbox = document.querySelector('.checkout-checkbox');
  if (checkbox) {
    checkbox.checked = false;
    checkbox.dispatchEvent(new Event('change'));
  }
});
</script>