Set Value Into Child table field

13

Thanks again,
frappe.ui.form.on(‘Implement Plan’, {
plan_add: function(frm,locals,cdt,cdn){
frappe.model.set_value(cdt,cdn,“tcd”,get_today_date(30));
frm.refresh_field(“tcd”);
}
});
function get_today_date(numb) {
var d = new Date();
var result = d.setDate(d.getDate() + (Number(numb)));
console.log(new Date(parseInt(result)));
return new Date(parseInt(result));
};