diff --git a/erpnext/accounts/doctype/tax_rule/tax_rule.py b/erpnext/accounts/doctype/tax_rule/tax_rule.py
index 6863aa15b28..69ddbbafdb2 100644
--- a/erpnext/accounts/doctype/tax_rule/tax_rule.py
+++ b/erpnext/accounts/doctype/tax_rule/tax_rule.py
@@ -135,7 +135,7 @@ class TaxRule(Document):
 
 
 @frappe.whitelist()
-def get_party_details(party: str, party_type: str, args: dict | None = None):
+def get_party_details(party: str | None, party_type: str, args: dict | None = None):
 	out = {}
 	billing_address, shipping_address = None, None
 	if args:
diff --git a/erpnext/accounts/party.py b/erpnext/accounts/party.py
index 2a1e3abe8bf..450e973845a 100644
--- a/erpnext/accounts/party.py
+++ b/erpnext/accounts/party.py
@@ -719,7 +719,7 @@ def get_address_tax_category(
 
 @frappe.whitelist()
 def set_taxes(
-	party: str,
+	party: str | None,
 	party_type: str,
 	posting_date: str | date | None,
 	company: str | None,