//Replace Your Field with "custom_salary1" // frappe.ui.form.on('Employee', { refresh: function(frm) { // Add a trigger when the form is refreshed or loaded frm.events.custom_salary1_from_ctc(frm); }, ctc: function(frm) { // Add a trigger when the ctc field is changed frm.events.custom_salary1_from_ctc(frm); }, custom_salary1_from_ctc: function(frm) { // Get the value from the ctc field and set it in custom_salary1 var ctc_value = frm.doc.ctc; frm.set_value('custom_salary1', ctc_value); } });