fix: rate based on posting date in Tax Withholding Report

(cherry picked from commit a32a79e90a)

erpnext/accounts/report/tds_payable_monthly/tds_payable_monthly.py

@@ -4,6 +4,7 @@
 
 import frappe
 from frappe import _
+from frappe.utils import getdate
 
 
 def execute(filters=None):
@@ -33,6 +34,7 @@ def execute(filters=None):
 
 def validate_filters(filters):
 	"""Validate if dates are properly set"""
+	filters = frappe._dict(filters or {})
 	if filters.from_date > filters.to_date:
 		frappe.throw(_("From Date must be before To Date"))
 
@@ -68,7 +70,7 @@ def get_result(filters, tds_docs, tds_accounts, tax_category_map, journal_entry_
 				if not tax_withholding_category:
 					tax_withholding_category = party_map.get(party, {}).get("tax_withholding_category")
 
-				rate = tax_rate_map.get(tax_withholding_category)
+				rate = get_tax_withholding_rates(tax_rate_map.get(tax_withholding_category, []), posting_date)
 			if net_total_map.get((voucher_type, name)):
 				if voucher_type == "Journal Entry" and tax_amount and rate:
 					# back calcalute total amount from rate and tax_amount
@@ -435,12 +437,22 @@ def get_doc_info(vouchers, doctype, tax_category_map, net_total_map=None):
 def get_tax_rate_map(filters):
 	rate_map = frappe.get_all(
 		"Tax Withholding Rate",
-		filters={
-			"from_date": ("<=", filters.get("from_date")),
-			"to_date": (">=", filters.get("to_date")),
-		},
-		fields=["parent", "tax_withholding_rate"],
-		as_list=1,
+		filters={"from_date": ("<=", filters.to_date), "to_date": (">=", filters.from_date)},
+		fields=["parent", "tax_withholding_rate", "from_date", "to_date"],
 	)
 
-	return frappe._dict(rate_map)
+	rate_list = frappe._dict()
+
+	for rate in rate_map:
+		rate_list.setdefault(rate.parent, []).append(frappe._dict(rate))
+
+	return rate_list
+
+
+def get_tax_withholding_rates(tax_withholding, posting_date):
+	# returns the row that matches with the fiscal year from posting date
+	for rate in tax_withholding:
+		if getdate(rate.from_date) <= getdate(posting_date) <= getdate(rate.to_date):
+			return rate.tax_withholding_rate
+
+	return 0