How to Connect Taxation to Custom Script Run Grand Total and Automatically Convert from Base Currenc

1

Please, can anyone show me how to connect the Tax table to a setup run by custom script? Here is the custom script provided by @ Balamurugan_Ravichan

frappe.ui.form.on("Your Child Table Name Here!", {
  item_code: function (frm, cdt, cdn) {
    var child = locals[cdt][cdn];
    if (child.item_code) {
      calculateGrandTotal(frm);
    }
  },

  qty: function (frm, cdt, cdn) {
    var d = locals[cdt][cdn];
    frappe.model.set_value(cdt, cdn, "amount", d.qty * d.rate);
    calculateGrandTotal(frm);
  },

  rate: function (frm, cdt, cdn) {
    var d = locals[cdt][cdn];
    frappe.model.set_value(cdt, cdn, "amount", d.qty * d.rate);
    calculateGrandTotal(frm);
  },
});

function calculateGrandTotal(frm) {
  var grand_total = 0;
  frm.doc.items.forEach(function (item) {
    grand_total += item.amount;
  });
  frm.set_value("grand_total", grand_total);
}

Also, if the customer’s default currency is for example Euro, how can I make my DocType convert from the default Dollars to Euro?

Thank you in advance.

2

Can anyone help me with this?