diff --git a/addons/l10n_ca/models/res_company.py b/addons/l10n_ca/models/res_company.py
index 512ba1456eb..89b34f6e35d 100644
--- a/addons/l10n_ca/models/res_company.py
+++ b/addons/l10n_ca/models/res_company.py
@@ -5,3 +5,10 @@ class ResCompany(models.Model):
     _inherit = 'res.company'
 
     l10n_ca_pst = fields.Char(related='partner_id.l10n_ca_pst', string='PST Number', store=False, readonly=False)
+
+
+class BaseDocumentLayout(models.TransientModel):
+    _inherit = 'base.document.layout'
+
+    l10n_ca_pst = fields.Char(related='company_id.l10n_ca_pst', readonly=True)
+    account_fiscal_country_id = fields.Many2one(related="company_id.account_fiscal_country_id", readonly=True)