fix: Test data for empty db
diff --git a/erpnext/accounts/report/tax_detail/test_tax_detail.json b/erpnext/accounts/report/tax_detail/test_tax_detail.json
index 17248d0..977920a 100644
--- a/erpnext/accounts/report/tax_detail/test_tax_detail.json
+++ b/erpnext/accounts/report/tax_detail/test_tax_detail.json
@@ -7,6 +7,98 @@
   "doctype": "Company",
   "name": "_T"
  },{
+  "account_manager": null,
+  "accounts": [],
+  "companies": [],
+  "credit_limits": [],
+  "customer_details": null,
+  "customer_group": "All Customer Groups",
+  "customer_name": "_Test Customer",
+  "customer_pos_id": null,
+  "customer_primary_address": null,
+  "customer_primary_contact": null,
+  "customer_type": "Company",
+  "default_bank_account": null,
+  "default_commission_rate": 0.0,
+  "default_currency": null,
+  "default_price_list": null,
+  "default_sales_partner": null,
+  "disabled": 0,
+  "dn_required": 0,
+  "docstatus": 0,
+  "doctype": "Customer",
+  "email_id": null,
+  "gender": null,
+  "image": null,
+  "industry": null,
+  "is_frozen": 0,
+  "is_internal_customer": 0,
+  "language": "en",
+  "lead_name": null,
+  "loyalty_program": null,
+  "loyalty_program_tier": null,
+  "market_segment": null,
+  "mobile_no": null,
+  "modified": "2021-02-15 05:18:03.624724",
+  "name": "_Test Customer",
+  "naming_series": "CUST-.YYYY.-",
+  "pan": null,
+  "parent": null,
+  "parentfield": null,
+  "parenttype": null,
+  "payment_terms": null,
+  "primary_address": null,
+  "represents_company": "",
+  "sales_team": [],
+  "salutation": null,
+  "so_required": 0,
+  "tax_category": null,
+  "tax_id": null,
+  "tax_withholding_category": null,
+  "territory": "All Territories",
+  "website": null
+ },{
+  "accounts": [],
+  "allow_purchase_invoice_creation_without_purchase_order": 0,
+  "allow_purchase_invoice_creation_without_purchase_receipt": 0,
+  "companies": [],
+  "country": "United Kingdom",
+  "default_bank_account": null,
+  "default_currency": null,
+  "default_price_list": null,
+  "disabled": 0,
+  "docstatus": 0,
+  "doctype": "Supplier",
+  "hold_type": "",
+  "image": null,
+  "is_frozen": 0,
+  "is_internal_supplier": 0,
+  "is_transporter": 0,
+  "language": "en",
+  "modified": "2021-03-31 16:47:10.109316",
+  "name": "_Test Supplier",
+  "naming_series": "SUP-.YYYY.-",
+  "on_hold": 0,
+  "pan": null,
+  "parent": null,
+  "parentfield": null,
+  "parenttype": null,
+  "payment_terms": null,
+  "prevent_pos": 0,
+  "prevent_rfqs": 0,
+  "release_date": null,
+  "represents_company": null,
+  "supplier_details": null,
+  "supplier_group": "Raw Material",
+  "supplier_name": "_Test Supplier",
+  "supplier_type": "Company",
+  "tax_category": null,
+  "tax_id": null,
+  "tax_withholding_category": null,
+  "warn_pos": 0,
+  "warn_rfqs": 0,
+  "website": null
+ },{
   "account_currency": "GBP",
   "account_name": "Debtors",
   "account_number": "",
@@ -251,7 +343,7 @@
     "item_name": "Widget Fluid 1Litre",
     "item_tax_amount": 0.0,
     "item_tax_rate": "{\"VAT on Purchases - _T\": 20.0}",
-    "item_tax_template": "Purchase - Standard VAT",
+    "item_tax_template": null,
     "landed_cost_voucher_amount": 0.0,
     "manufacturer": null,
     "manufacturer_part_no": null,
@@ -336,11 +428,11 @@
   "shipping_rule": null,
   "status": "Unpaid",
   "supplied_items": [],
-  "supplier": "Raw Materials Inc",
+  "supplier": "_Test Supplier",
   "supplier_address": null,
-  "supplier_name": "Raw Materials Inc",
+  "supplier_name": "_Test Supplier",
   "supplier_warehouse": "Stores - _T",
-  "tax_category": "Other Supplier",
+  "tax_category": null,
   "tax_id": null,
   "tax_withholding_category": null,
   "taxes": [
@@ -371,7 +463,7 @@
   "taxes_and_charges_deducted": 0.0,
   "tc_name": null,
   "terms": null,
-  "title": "Raw Materials Inc",
+  "title": "_Purchase Invoice",
   "to_date": null,
   "total": 426.4,
   "total_advance": 0.0,
@@ -421,10 +513,10 @@
   "conversion_rate": 1.0,
   "cost_center": null,
   "currency": "GBP",
-  "customer": "ABC Tyres",
+  "customer": "_Test Customer",
   "customer_address": null,
   "customer_group": "All Customer Groups",
-  "customer_name": "ABC Tyres",
+  "customer_name": "_Test Customer",
   "debit_to": "Debtors - _T",
   "discount_amount": 0.0,
   "docstatus": 0,
@@ -481,7 +573,7 @@
     "item_group": null,
     "item_name": "Dunlop tyres",
     "item_tax_rate": "{\"VAT on Sales - _T\": 20.0}",
-    "item_tax_template": "Sale - Standard VAT",
+    "item_tax_template": null,
     "margin_rate_or_amount": 0.0,
     "margin_type": "",
     "net_amount": 200.0,
@@ -552,7 +644,7 @@
     "item_group": null,
     "item_name": "Continental tyres",
     "item_tax_rate": "{\"VAT on Sales - _T\": 5.0}",
-    "item_tax_template": "Sale - Reduced VAT",
+    "item_tax_template": null,
     "margin_rate_or_amount": 0.0,
     "margin_type": "",
     "net_amount": 65.0,
@@ -623,7 +715,7 @@
     "item_group": null,
     "item_name": "Toyo tyres",
     "item_tax_rate": "{\"VAT on Sales - _T\": 0.0}",
-    "item_tax_template": "Sale - Zero VAT",
+    "item_tax_template": null,
     "margin_rate_or_amount": 0.0,
     "margin_type": "",
     "net_amount": 560.0,
@@ -735,7 +827,7 @@
   "terms": null,
   "territory": "All Territories",
   "timesheets": [],
-  "title": "ABC Tyres",
+  "title": "_Sales Invoice",
   "to_date": null,
   "total": 825.0,
   "total_advance": 0.0,
@@ -752,4 +844,4 @@
   "write_off_cost_center": null,
   "write_off_outstanding_amount_automatically": 0
  }
-]
\ No newline at end of file
+]
diff --git a/erpnext/accounts/report/tax_detail/test_tax_detail.py b/erpnext/accounts/report/tax_detail/test_tax_detail.py
index 614ef8d..21732b9 100644
--- a/erpnext/accounts/report/tax_detail/test_tax_detail.py
+++ b/erpnext/accounts/report/tax_detail/test_tax_detail.py
@@ -5,34 +5,27 @@
 import datetime
 import json
 import os
-from frappe.utils import getdate, add_to_date, get_first_day, get_last_day
+from frappe.utils import getdate, add_to_date, get_first_day, get_last_day, get_year_start, get_year_ending
 from .tax_detail import filter_match, save_custom_report
 
 class TestTaxDetail(unittest.TestCase):
 	def load_testdocs(self):
 		datapath, _ = os.path.splitext(os.path.realpath(__file__))
 		with open(datapath + '.json', 'r') as fp:
-			self.docs = json.load(fp)
+			docs = json.load(fp)
 
-	def load_defcols(self):
-		custom_report = frappe.get_doc('Report', 'Tax Detail')
-		self.default_columns, _ = custom_report.run_query_report(
-			filters={
-				'from_date': '2021-03-01',
-				'to_date': '2021-03-31',
-				'company': '_T',
-				'mode': 'run',
-				'report_name': 'Tax Detail'
-			}, user=frappe.session.user)
-
-	def setUp(self):
-		"Add Transactions in 01-03-2021 - 31-03-2021"
-		self.load_testdocs()
 		now = getdate()
 		self.from_date = get_first_day(now)
 		self.to_date = get_last_day(now)
 
-		for doc in self.docs:
+		docs = [{
+			"doctype": "Fiscal Year",
+			"year": "_Test Fiscal",
+			"year_end_date": get_year_ending(now),
+			"year_start_date": get_year_start(now)
+		}] + docs
+
+		for doc in docs:
 			try:
 				db_doc = frappe.get_doc(doc)
 				if 'Invoice' in db_doc.doctype:
@@ -45,15 +38,28 @@
 			except frappe.exceptions.DuplicateEntryError:
 				pass
 
+	def load_defcols(self):
+		self.company = frappe.get_doc('Company', '_T')
+		custom_report = frappe.get_doc('Report', 'Tax Detail')
+		self.default_columns, _ = custom_report.run_query_report(
+			filters={
+				'from_date': '2021-03-01',
+				'to_date': '2021-03-31',
+				'company': self.company.name,
+				'mode': 'run',
+				'report_name': 'Tax Detail'
+			}, user=frappe.session.user)
+
+	def setUp(self):
+		self.load_testdocs()
 		self.load_defcols()
 
 	def tearDown(self):
 		"Remove the Company and all data"
 		from erpnext.setup.doctype.company.delete_company_transactions import delete_company_transactions
-		for co in filter(lambda doc: doc['doctype'] == 'Company', self.docs):
-			delete_company_transactions(co['name'])
-			db_co = frappe.get_doc('Company', co['name'])
-			db_co.delete()
+		delete_company_transactions(self.company.name)
+		self.company.delete()
+
 
 	def test_report(self):
 		report_name = save_custom_report(
@@ -78,7 +84,7 @@
 			filters={
 				'from_date': self.from_date,
 				'to_date': self.to_date,
-				'company': '_T',
+				'company': self.company.name,
 				'mode': 'run',
 				'report_name': report_name
 			}, user=frappe.session.user)