diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 4008863..1f5879d 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -710,6 +710,7 @@
 		if (
 			cint(frappe.db.get_single_value("Selling Settings", "maintain_same_sales_rate"))
 			and not self.is_return
+			and not self.is_internal_customer
 		):
 			self.validate_rate_with_reference_doc(
 				[["Sales Order", "sales_order", "so_detail"], ["Delivery Note", "delivery_note", "dn_detail"]]
@@ -2161,6 +2162,17 @@
 
 	def update_item(source, target, source_parent):
 		target.qty = flt(source.qty) - received_items.get(source.name, 0.0)
+		if source.doctype == "Purchase Order Item" and target.doctype == "Sales Order Item":
+			target.purchase_order = source.parent
+			target.purchase_order_item = source.name
+
+		if (
+			source.get("purchase_order")
+			and source.get("purchase_order_item")
+			and target.doctype == "Purchase Invoice Item"
+		):
+			target.purchase_order = source.purchase_order
+			target.po_detail = source.purchase_order_item
 
 	item_field_map = {
 		"doctype": target_doctype + " Item",
@@ -2187,6 +2199,12 @@
 				"serial_no": "serial_no",
 			}
 		)
+	elif target_doctype == "Sales Order":
+		item_field_map["field_map"].update(
+			{
+				source_document_warehouse_field: "warehouse",
+			}
+		)
 
 	doclist = get_mapped_doc(
 		doctype,
@@ -2231,6 +2249,7 @@
 
 def set_purchase_references(doc):
 	# add internal PO or PR links if any
+
 	if doc.is_internal_transfer():
 		if doc.doctype == "Purchase Receipt":
 			so_item_map = get_delivery_note_details(doc.inter_company_invoice_reference)
@@ -2260,15 +2279,6 @@
 					warehouse_map,
 				)
 
-			if list(so_item_map.values()):
-				pd_item_map, parent_child_map, warehouse_map = get_pd_details(
-					"Purchase Order Item", so_item_map, "sales_order_item"
-				)
-
-				update_pi_items(
-					doc, "po_detail", "purchase_order", so_item_map, pd_item_map, parent_child_map, warehouse_map
-				)
-
 
 def update_pi_items(
 	doc,
@@ -2284,13 +2294,19 @@
 		item.set(parent_field, parent_child_map.get(sales_item_map.get(item.sales_invoice_item)))
 		if doc.update_stock:
 			item.warehouse = warehouse_map.get(sales_item_map.get(item.sales_invoice_item))
+			if not item.warehouse and item.get("purchase_order") and item.get("purchase_order_item"):
+				item.warehouse = frappe.db.get_value(
+					"Purchase Order Item", item.purchase_order_item, "warehouse"
+				)
 
 
 def update_pr_items(doc, sales_item_map, purchase_item_map, parent_child_map, warehouse_map):
 	for item in doc.get("items"):
-		item.purchase_order_item = purchase_item_map.get(sales_item_map.get(item.delivery_note_item))
 		item.warehouse = warehouse_map.get(sales_item_map.get(item.delivery_note_item))
-		item.purchase_order = parent_child_map.get(sales_item_map.get(item.delivery_note_item))
+		if not item.warehouse and item.get("purchase_order") and item.get("purchase_order_item"):
+			item.warehouse = frappe.db.get_value(
+				"Purchase Order Item", item.purchase_order_item, "warehouse"
+			)
 
 
 def get_delivery_note_details(internal_reference):
diff --git a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
index 7cddf12..4f97b63 100644
--- a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
+++ b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
@@ -96,6 +96,10 @@
   "delivery_note",
   "dn_detail",
   "delivered_qty",
+  "internal_transfer_section",
+  "purchase_order",
+  "column_break_92",
+  "purchase_order_item",
   "accounting_dimensions_section",
   "cost_center",
   "dimension_col_break",
@@ -840,12 +844,38 @@
    "fieldtype": "Check",
    "label": "Grant Commission",
    "read_only": 1
+  },
+  {
+   "collapsible": 1,
+   "depends_on": "eval:parent.is_internal_customer == 1",
+   "fieldname": "internal_transfer_section",
+   "fieldtype": "Section Break",
+   "label": "Internal Transfer"
+  },
+  {
+   "fieldname": "purchase_order",
+   "fieldtype": "Link",
+   "label": "Purchase Order",
+   "options": "Purchase Order",
+   "print_hide": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "column_break_92",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "purchase_order_item",
+   "fieldtype": "Data",
+   "label": "Purchase Order Item",
+   "print_hide": 1,
+   "read_only": 1
   }
  ],
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2022-08-26 12:06:31.205417",
+ "modified": "2022-09-06 14:17:43.394309",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Sales Invoice Item",
diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.json b/erpnext/buying/doctype/purchase_order/purchase_order.json
index aa50487..acca380 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.json
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.json
@@ -60,6 +60,7 @@
   "section_break_45",
   "before_items_section",
   "scan_barcode",
+  "set_from_warehouse",
   "items_col_break",
   "set_warehouse",
   "items_section",
@@ -1166,13 +1167,20 @@
    "hidden": 1,
    "label": "Is Old Subcontracting Flow",
    "read_only": 1
+  },
+  {
+   "depends_on": "is_internal_supplier",
+   "fieldname": "set_from_warehouse",
+   "fieldtype": "Link",
+   "label": "Set From Warehouse",
+   "options": "Warehouse"
   }
  ],
  "icon": "fa fa-file-text",
  "idx": 105,
  "is_submittable": 1,
  "links": [],
- "modified": "2022-06-15 15:40:58.527065",
+ "modified": "2022-09-07 11:06:46.035093",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Purchase Order",
diff --git a/erpnext/buying/doctype/purchase_order/purchase_order_dashboard.py b/erpnext/buying/doctype/purchase_order/purchase_order_dashboard.py
index 01b55c0..05b5a8e 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order_dashboard.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order_dashboard.py
@@ -23,5 +23,6 @@
 				"items": ["Material Request", "Supplier Quotation", "Project", "Auto Repeat"],
 			},
 			{"label": _("Sub-contracting"), "items": ["Subcontracting Order", "Stock Entry"]},
+			{"label": _("Internal"), "items": ["Sales Order"]},
 		],
 	}
diff --git a/erpnext/buying/doctype/purchase_order/test_purchase_order.py b/erpnext/buying/doctype/purchase_order/test_purchase_order.py
index bd7e4e8..6029a68 100644
--- a/erpnext/buying/doctype/purchase_order/test_purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/test_purchase_order.py
@@ -9,6 +9,7 @@
 from frappe.utils import add_days, flt, getdate, nowdate
 
 from erpnext.accounts.doctype.payment_entry.payment_entry import get_payment_entry
+from erpnext.buying.doctype.purchase_order.purchase_order import make_inter_company_sales_order
 from erpnext.buying.doctype.purchase_order.purchase_order import (
 	make_purchase_invoice as make_pi_from_po,
 )
@@ -796,6 +797,56 @@
 
 		automatically_fetch_payment_terms(enable=0)
 
+	def test_internal_transfer_flow(self):
+		from erpnext.selling.doctype.sales_order.sales_order import make_delivery_note
+
+		prepare_data_for_internal_transfer()
+		supplier = "_Test Internal Supplier 2"
+		customer = "_Test Internal Customer 2"
+
+		po = create_purchase_order(
+			company="_Test Company with perpetual inventory",
+			supplier=supplier,
+			warehouse="Stores - TCP1",
+			from_warehouse="_Test Internal Warehouse New 1 - TCP1",
+			qty=2,
+			rate=1,
+		)
+
+		so = make_inter_company_sales_order(po.name)
+		so.submit()
+
+		dn = make_delivery_note(so.name)
+
+
+def prepare_data_for_internal_transfer():
+	from erpnext.accounts.doctype.sales_invoice.test_sales_invoice import create_internal_supplier
+	from erpnext.selling.doctype.customer.test_customer import create_internal_customer
+	from erpnext.stock.doctype.purchase_receipt.test_purchase_receipt import make_purchase_receipt
+	from erpnext.stock.doctype.warehouse.test_warehouse import create_warehouse
+
+	create_internal_customer(
+		"_Test Internal Customer 2",
+		"_Test Company with perpetual inventory",
+		"_Test Company with perpetual inventory",
+	)
+
+	create_internal_supplier(
+		"_Test Internal Supplier 2",
+		"_Test Company with perpetual inventory",
+		"_Test Company with perpetual inventory",
+	)
+
+	warehouse = create_warehouse(
+		"_Test Internal Warehouse New 1", company="_Test Company with perpetual inventory"
+	)
+
+	make_purchase_receipt(
+		company="_Test Company with perpetual inventory",
+		warehouse=warehouse,
+		qty=2,
+	)
+
 
 def make_pr_against_po(po, received_qty=0):
 	pr = make_purchase_receipt(po)
@@ -847,6 +898,7 @@
 			{
 				"item_code": args.item or args.item_code or "_Test Item",
 				"warehouse": args.warehouse or "_Test Warehouse - _TC",
+				"from_warehouse": args.from_warehouse,
 				"qty": args.qty or 10,
 				"rate": args.rate or 500,
 				"schedule_date": add_days(nowdate(), 1),
diff --git a/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json b/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
index 1a98453..82e92e8 100644
--- a/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
+++ b/erpnext/buying/doctype/purchase_order_item/purchase_order_item.json
@@ -10,12 +10,14 @@
   "item_code",
   "supplier_part_no",
   "item_name",
+  "brand",
   "product_bundle",
   "fg_item",
   "fg_item_qty",
   "column_break_4",
   "schedule_date",
   "expected_delivery_date",
+  "item_group",
   "section_break_5",
   "description",
   "col_break1",
@@ -58,9 +60,12 @@
   "base_net_rate",
   "base_net_amount",
   "warehouse_and_reference",
+  "from_warehouse",
   "warehouse",
+  "column_break_54",
   "actual_qty",
   "company_total_stock",
+  "references_section",
   "material_request",
   "material_request_item",
   "sales_order",
@@ -73,8 +78,6 @@
   "against_blanket_order",
   "blanket_order",
   "blanket_order_rate",
-  "item_group",
-  "brand",
   "section_break_56",
   "received_qty",
   "returned_qty",
@@ -442,13 +445,13 @@
   {
    "fieldname": "warehouse_and_reference",
    "fieldtype": "Section Break",
-   "label": "Warehouse and Reference"
+   "label": "Warehouse Settings"
   },
   {
    "fieldname": "warehouse",
    "fieldtype": "Link",
    "in_list_view": 1,
-   "label": "Warehouse",
+   "label": "Target Warehouse",
    "oldfieldname": "warehouse",
    "oldfieldtype": "Link",
    "options": "Warehouse",
@@ -760,7 +763,7 @@
    "allow_on_submit": 1,
    "fieldname": "actual_qty",
    "fieldtype": "Float",
-   "label": "Available Qty at Warehouse",
+   "label": "Available Qty at Target Warehouse",
    "print_hide": 1,
    "read_only": 1
   },
@@ -868,13 +871,30 @@
    "fieldtype": "Float",
    "label": "Finished Good Item Qty",
    "mandatory_depends_on": "eval:parent.is_subcontracted && !parent.is_old_subcontracting_flow"
+  },
+  {
+   "depends_on": "eval:parent.is_internal_supplier",
+   "fieldname": "from_warehouse",
+   "fieldtype": "Link",
+   "label": "From Warehouse",
+   "options": "Warehouse"
+  },
+  {
+   "collapsible": 1,
+   "fieldname": "references_section",
+   "fieldtype": "Section Break",
+   "label": "References"
+  },
+  {
+   "fieldname": "column_break_54",
+   "fieldtype": "Column Break"
   }
  ],
  "idx": 1,
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2022-06-17 05:29:40.602349",
+ "modified": "2022-09-07 11:12:38.634976",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Purchase Order Item",
diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index e689d56..6f321f4 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -373,7 +373,7 @@
 				)
 
 	def validate_inter_company_reference(self):
-		if self.doctype not in ("Purchase Invoice", "Purchase Receipt", "Purchase Order"):
+		if self.doctype not in ("Purchase Invoice", "Purchase Receipt"):
 			return
 
 		if self.is_internal_transfer():
diff --git a/erpnext/controllers/status_updater.py b/erpnext/controllers/status_updater.py
index 197d2ba..6e7d2b3 100644
--- a/erpnext/controllers/status_updater.py
+++ b/erpnext/controllers/status_updater.py
@@ -307,6 +307,20 @@
 
 	def limits_crossed_error(self, args, item, qty_or_amount):
 		"""Raise exception for limits crossed"""
+		if (
+			self.doctype in ["Sales Invoice", "Delivery Note"]
+			and qty_or_amount == "amount"
+			and self.is_internal_customer
+		):
+			return
+
+		elif (
+			self.doctype in ["Purchase Invoice", "Purchase Receipt"]
+			and qty_or_amount == "amount"
+			and self.is_internal_supplier
+		):
+			return
+
 		if qty_or_amount == "qty":
 			action_msg = _(
 				'To allow over receipt / delivery, update "Over Receipt/Delivery Allowance" in Stock Settings or the Item.'
diff --git a/erpnext/selling/doctype/sales_order/sales_order.js b/erpnext/selling/doctype/sales_order/sales_order.js
index 6b6ea89..386c12b 100644
--- a/erpnext/selling/doctype/sales_order/sales_order.js
+++ b/erpnext/selling/doctype/sales_order/sales_order.js
@@ -59,7 +59,36 @@
 				})
 			});
 		}
+
+		if (frm.doc.docstatus === 0 && frm.doc.is_internal_customer) {
+			frm.events.get_items_from_internal_purchase_order(frm);
+		}
 	},
+
+	get_items_from_internal_purchase_order(frm) {
+		frm.add_custom_button(__('Purchase Order'), () => {
+			erpnext.utils.map_current_doc({
+				method: 'erpnext.buying.doctype.purchase_order.purchase_order.make_inter_company_sales_order',
+				source_doctype: 'Purchase Order',
+				target: frm,
+				setters: [
+					{
+						label: 'Supplier',
+						fieldname: 'supplier',
+						fieldtype: 'Link',
+						options: 'Supplier'
+					}
+				],
+				get_query_filters: {
+					company: frm.doc.company,
+					is_internal_supplier: 1,
+					docstatus: 1,
+					status: ['!=', 'Completed']
+				}
+			});
+		}, __('Get Items From'));
+	},
+
 	onload: function(frm) {
 		if (!frm.doc.transaction_date){
 			frm.set_value('transaction_date', frappe.datetime.get_today())
diff --git a/erpnext/selling/doctype/sales_order_item/sales_order_item.json b/erpnext/selling/doctype/sales_order_item/sales_order_item.json
index 3187999..2cf836f 100644
--- a/erpnext/selling/doctype/sales_order_item/sales_order_item.json
+++ b/erpnext/selling/doctype/sales_order_item/sales_order_item.json
@@ -92,7 +92,11 @@
   "section_break_63",
   "page_break",
   "item_tax_rate",
-  "transaction_date"
+  "transaction_date",
+  "inter_transfer_reference_section",
+  "purchase_order",
+  "column_break_89",
+  "purchase_order_item"
  ],
  "fields": [
   {
@@ -809,12 +813,36 @@
    "label": "Picked Qty (in Stock UOM)",
    "no_copy": 1,
    "read_only": 1
+  },
+  {
+   "fieldname": "inter_transfer_reference_section",
+   "fieldtype": "Section Break",
+   "label": "Inter Transfer Reference"
+  },
+  {
+   "fieldname": "purchase_order",
+   "fieldtype": "Link",
+   "label": "Purchase Order",
+   "options": "Purchase Order",
+   "print_hide": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "column_break_89",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "purchase_order_item",
+   "fieldtype": "Data",
+   "label": "Purchase Order Item",
+   "print_hide": 1,
+   "read_only": 1
   }
  ],
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2022-06-17 05:27:41.603006",
+ "modified": "2022-09-06 13:24:18.065312",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Sales Order Item",
diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.py b/erpnext/stock/doctype/delivery_note/delivery_note.py
index 0e68e85..36d5a6c 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.py
@@ -178,6 +178,7 @@
 		if (
 			cint(frappe.db.get_single_value("Selling Settings", "maintain_same_sales_rate"))
 			and not self.is_return
+			and not self.is_internal_customer
 		):
 			self.validate_rate_with_reference_doc(
 				[
@@ -896,6 +897,8 @@
 					"name": "delivery_note_item",
 					"batch_no": "batch_no",
 					"serial_no": "serial_no",
+					"purchase_order": "purchase_order",
+					"purchase_order_item": "purchase_order_item",
 				},
 				"field_no_map": ["warehouse"],
 			},
diff --git a/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json b/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
index 2de4842..0911cdb 100644
--- a/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
+++ b/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
@@ -86,6 +86,10 @@
   "expense_account",
   "allow_zero_valuation_rate",
   "column_break_71",
+  "internal_transfer_section",
+  "purchase_order",
+  "column_break_82",
+  "purchase_order_item",
   "accounting_dimensions_section",
   "cost_center",
   "dimension_col_break",
@@ -777,13 +781,39 @@
    "no_copy": 1,
    "print_hide": 1,
    "read_only": 1
+  },
+  {
+   "collapsible": 1,
+   "depends_on": "eval:parent.is_internal_customer == 1",
+   "fieldname": "internal_transfer_section",
+   "fieldtype": "Section Break",
+   "label": "Internal Transfer"
+  },
+  {
+   "fieldname": "purchase_order",
+   "fieldtype": "Link",
+   "label": "Purchase Order",
+   "options": "Purchase Order",
+   "print_hide": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "column_break_82",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "purchase_order_item",
+   "fieldtype": "Data",
+   "label": "Purchase Order Item",
+   "print_hide": 1,
+   "read_only": 1
   }
  ],
  "idx": 1,
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2022-06-17 05:25:47.711177",
+ "modified": "2022-09-06 14:19:42.876357",
  "modified_by": "Administrator",
  "module": "Stock",
  "name": "Delivery Note Item",
diff --git a/erpnext/utilities/transaction_base.py b/erpnext/utilities/transaction_base.py
index cd1bf9f..21a0a55 100644
--- a/erpnext/utilities/transaction_base.py
+++ b/erpnext/utilities/transaction_base.py
@@ -71,6 +71,9 @@
 						self.validate_value(field, condition, prevdoc_values[field], doc)
 
 	def validate_rate_with_reference_doc(self, ref_details):
+		if self.get("is_internal_supplier"):
+			return
+
 		buying_doctypes = ["Purchase Order", "Purchase Invoice", "Purchase Receipt"]
 
 		if self.doctype in buying_doctypes: