Exemption Declaration - field total_amount

erpnext/hr/doctype/employee_tax_exemption_declaration/employee_tax_exemption_declaration.json

@@ -139,6 +139,37 @@
    "translatable": 0, 
    "unique": 0
   }, 
+  {
+   "allow_bulk_edit": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "fieldname": "total_exemption_amount", 
+   "fieldtype": "Currency", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "label": "Total Exemption Amount", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 1, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "translatable": 0, 
+   "unique": 0
+  }, 
   {
    "allow_bulk_edit": 0, 
    "allow_on_submit": 0, 
@@ -243,7 +274,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2018-05-15 16:16:46.075493", 
+ "modified": "2018-05-16 19:03:57.624215", 
  "modified_by": "Administrator", 
  "module": "HR", 
  "name": "Employee Tax Exemption Declaration", 

erpnext/hr/doctype/employee_tax_exemption_declaration/employee_tax_exemption_declaration.py

@@ -19,3 +19,6 @@ class EmployeeTaxExemptionDeclaration(Document):
 							"docstatus": 1}):
 			frappe.throw(_("Tax Declaration of {0} for period {1} already submitted.")\
 			.format(self.employee, self.payroll_period), frappe.DocstatusTransitionError)
+		self.total_exemption_amount = 0
+		for item in self.declarations:
+			self.total_exemption_amount += item.amount