diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index 79dc1e4f3ce..6801786220b 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -352,8 +352,8 @@ class AccountMoveLine(models.Model):
         help="This field is used for payable and receivable journal entries. You can put the limit date for the payment of this line.")
     date = fields.Date(related='move_id.date', string='Date', required=True, index=True, default=fields.Date.context_today, store=True, copy=False)
     analytic_line_ids = fields.One2many('account.analytic.line', 'move_id', string='Analytic lines', oldname="analytic_lines")
-    tax_ids = fields.Many2many('account.tax', string='Taxes', copy=False, readonly=True)
-    tax_line_id = fields.Many2one('account.tax', string='Originator tax', copy=False, readonly=True)
+    tax_ids = fields.Many2many('account.tax', string='Taxes', readonly=True)
+    tax_line_id = fields.Many2one('account.tax', string='Originator tax', readonly=True)
     analytic_account_id = fields.Many2one('account.analytic.account', string='Analytic Account')
     company_id = fields.Many2one('res.company', related='account_id.company_id', string='Company', store=True)
     counterpart = fields.Char("Counterpart", compute='_get_counterpart', help="Compute the counter part accounts of this journal item for this journal entry. This can be needed in reports.")