fix: fiscal year test case issue
diff --git a/erpnext/accounts/report/tax_detail/test_tax_detail.json b/erpnext/accounts/report/tax_detail/test_tax_detail.json
index 977920a..3a4b175 100644
--- a/erpnext/accounts/report/tax_detail/test_tax_detail.json
+++ b/erpnext/accounts/report/tax_detail/test_tax_detail.json
@@ -1,12 +1,5 @@
 [
  {
-  "abbr": "_T",
-  "company_name": "_T",
-  "country": "United Kingdom",
-  "default_currency": "GBP",
-  "doctype": "Company",
-  "name": "_T"
- },{
   "account_manager": null,
   "accounts": [],
   "companies": [],
@@ -297,7 +290,7 @@
   "discount_amount": 0.0,
   "docstatus": 0,
   "doctype": "Purchase Invoice",
-  "due_date": "2021-04-30",
+  "due_date": null,
   "from_date": null,
   "grand_total": 511.68,
   "group_same_items": 0,
@@ -521,7 +514,7 @@
   "discount_amount": 0.0,
   "docstatus": 0,
   "doctype": "Sales Invoice",
-  "due_date": "2021-03-31",
+  "due_date": null,
   "from_date": null,
   "grand_total": 868.25,
   "group_same_items": 0,
diff --git a/erpnext/accounts/report/tax_detail/test_tax_detail.py b/erpnext/accounts/report/tax_detail/test_tax_detail.py
index 21732b9..dcf0e79 100644
--- a/erpnext/accounts/report/tax_detail/test_tax_detail.py
+++ b/erpnext/accounts/report/tax_detail/test_tax_detail.py
@@ -19,6 +19,19 @@
 		self.to_date = get_last_day(now)
 
 		docs = [{
+			"abbr": "_T",
+			"company_name": "_T",
+			"country": "United Kingdom",
+			"default_currency": "GBP",
+			"doctype": "Company",
+			"name": "_T"
+		},{
+			"companies": [{
+				"company": "_T",
+				"parent": "_Test Fiscal",
+				"parentfield": "companies",
+				"parenttype": "Fiscal Year"
+			}],
 			"doctype": "Fiscal Year",
 			"year": "_Test Fiscal",
 			"year_end_date": get_year_ending(now),