fix: tax.base_tax_amount as none when payment entry created using API

(cherry picked from commit b9b402f2ec)

erpnext/accounts/doctype/payment_entry/payment_entry.py

@@ -1197,9 +1197,9 @@ class PaymentEntry(AccountsController):
 				continue
 
 			if tax.add_deduct_tax == "Add":
-				included_taxes += tax.base_tax_amount
+				included_taxes += flt(tax.base_tax_amount)
 			else:
-				included_taxes -= tax.base_tax_amount
+				included_taxes -= flt(tax.base_tax_amount)
 
 		return included_taxes
 

erpnext/accounts/doctype/payment_entry/test_payment_entry.py

@@ -1118,6 +1118,27 @@ class TestPaymentEntry(FrappeTestCase):
 
 		self.assertEqual(gl_entries, expected_gl_entries)
 
+	def test_payment_entry_with_inclusive_tax(self):
+		# inclusive tax built server-side: base_tax_amount is None until apply_taxes()
+		payment_entry = create_payment_entry(paid_amount=1180)
+		payment_entry.append(
+			"taxes",
+			{
+				"account_head": "_Test Account Service Tax - _TC",
+				"charge_type": "On Paid Amount",
+				"rate": 18,
+				"included_in_paid_amount": 1,
+				"add_deduct_tax": "Add",
+				"description": "Service Tax",
+			},
+		)
+		payment_entry.save()
+		payment_entry.submit()
+
+		# 1180 incl 18% => 1000 base + 180 tax
+		self.assertEqual(flt(payment_entry.total_taxes_and_charges, 2), 180.0)
+		self.assertEqual(flt(payment_entry.unallocated_amount, 2), 1000.0)
+
 	def test_payment_entry_against_onhold_purchase_invoice(self):
 		pi = make_purchase_invoice()