diff --git a/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.js b/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.js
index b8d6c9a..7b47974 100644
--- a/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.js
+++ b/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.js
@@ -8,7 +8,8 @@
 			if (child.company) {
 				return {
 					filters: {
-						'company': child.company
+						'company': child.company,
+						'root_type': ['in', ['Asset', 'Liability']]
 					}
 				};
 			}
diff --git a/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py b/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py
index c3cb839..c36f3cb 100644
--- a/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py
+++ b/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py
@@ -13,6 +13,7 @@
 class TaxWithholdingCategory(Document):
 	def validate(self):
 		self.validate_dates()
+		self.validate_accounts()
 		self.validate_thresholds()
 
 	def validate_dates(self):
@@ -25,6 +26,14 @@
 			if last_date and getdate(d.to_date) < getdate(last_date):
 				frappe.throw(_("Row #{0}: Dates overlapping with other row").format(d.idx))
 
+	def validate_accounts(self):
+		existing_accounts = []
+		for d in self.get('accounts'):
+			if d.get('account') in existing_accounts:
+				frappe.throw(_("Account {0} added multiple times").format(frappe.bold(d.get('account'))))
+
+			existing_accounts.append(d.get('account'))
+
 	def validate_thresholds(self):
 		for d in self.get('rates'):
 			if d.cumulative_threshold and d.cumulative_threshold < d.single_threshold: