diff --git a/erpnext/accounts/doctype/repost_payment_ledger/repost_payment_ledger.py b/erpnext/accounts/doctype/repost_payment_ledger/repost_payment_ledger.py
index 9f6828f..7fab62c9 100644
--- a/erpnext/accounts/doctype/repost_payment_ledger/repost_payment_ledger.py
+++ b/erpnext/accounts/doctype/repost_payment_ledger/repost_payment_ledger.py
@@ -27,7 +27,7 @@
 	"""
 	if docname:
 		repost_doc = frappe.get_doc("Repost Payment Ledger", docname)
-		if repost_doc.docstatus == 1 and repost_doc.repost_status in ["Queued", "Failed"]:
+		if repost_doc.docstatus.is_submitted() and repost_doc.repost_status in ["Queued", "Failed"]:
 			try:
 				for entry in repost_doc.repost_vouchers:
 					doc = frappe.get_doc(entry.voucher_type, entry.voucher_no)
diff --git a/erpnext/controllers/sales_and_purchase_return.py b/erpnext/controllers/sales_and_purchase_return.py
index 15c82af..8bd0998 100644
--- a/erpnext/controllers/sales_and_purchase_return.py
+++ b/erpnext/controllers/sales_and_purchase_return.py
@@ -37,7 +37,7 @@
 		if (
 			ref_doc.company == doc.company
 			and ref_doc.get(party_type) == doc.get(party_type)
-			and ref_doc.docstatus == 1
+			and ref_doc.docstatus.is_submitted()
 		):
 			# validate posting date time
 			return_posting_datetime = "%s %s" % (doc.posting_date, doc.get("posting_time") or "00:00:00")
diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index c6a634b..8c403aa 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -6,6 +6,7 @@
 
 import frappe
 from frappe import _, scrub
+from frappe.model.document import Document
 from frappe.utils import cint, flt, round_based_on_smallest_currency_fraction
 
 import erpnext
@@ -20,7 +21,7 @@
 
 
 class calculate_taxes_and_totals(object):
-	def __init__(self, doc):
+	def __init__(self, doc: Document):
 		self.doc = doc
 		frappe.flags.round_off_applicable_accounts = []
 		get_round_off_applicable_accounts(self.doc.company, frappe.flags.round_off_applicable_accounts)
@@ -677,7 +678,7 @@
 			)
 
 	def calculate_total_advance(self):
-		if self.doc.docstatus < 2:
+		if not self.doc.docstatus.is_cancelled():
 			total_allocated_amount = sum(
 				flt(adv.allocated_amount, adv.precision("allocated_amount"))
 				for adv in self.doc.get("advances")
@@ -708,7 +709,7 @@
 					)
 				)
 
-			if self.doc.docstatus == 0:
+			if self.doc.docstatus.is_draft():
 				if self.doc.get("write_off_outstanding_amount_automatically"):
 					self.doc.write_off_amount = 0
 
diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 7c0601e..accf5f2 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -208,7 +208,7 @@
 		for quotation in set(d.prevdoc_docname for d in self.get("items")):
 			if quotation:
 				doc = frappe.get_doc("Quotation", quotation)
-				if doc.docstatus == 2:
+				if doc.docstatus.is_cancelled():
 					frappe.throw(_("Quotation {0} is cancelled").format(quotation))
 
 				doc.set_status(update=True)