legaladdress_from_customer

account_invoice_address_from_partner/__init__.py

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+from . import models

account_invoice_address_from_partner/__manifest__.py

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+{
+    "name": "Invoice address same as customer",
+    "version": "16.0.1.0.0",
+    "category": "Accounting",
+    "summary": "Keep invoice address exactly the same as the selected customer",
+    "description": """
+When selecting a customer on an invoice, the invoice address
+(partner_invoice_id) is set to exactly the same partner record,
+without collapsing to the commercial parent.
+""",
+    "depends": [
+        "account",
+    ],
+    "data": [],
+    "installable": True,
+    "application": False,
+    "license": "LGPL-3",
+}

account_invoice_address_from_partner/models/__init__.py

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+from . import account_move

account_invoice_address_from_partner/models/account_move.py

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+from odoo import api, models
+
+
+class AccountMove(models.Model):
+    _inherit = "account.move"
+
+    @api.onchange("partner_id")
+    def _onchange_partner_copy_to_invoice_address(self):
+        for move in self:
+            if move.partner_id:
+                # Copy Klant exactly to Factuuradres
+                move.partner_invoice_id = move.partner_id