[?]

account_invoice_tax/__init__.py

@@ -1,2 +1,3 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 from . import wizards
+from . import models

account_invoice_tax/models/__init__.py

@@ -0,0 +1,3 @@
+from . import account_move
+from . import account_move_line
+from . import account_tax

account_invoice_tax/models/account_move.py

@@ -0,0 +1,24 @@
+from odoo import models, fields, api
+
+
+class AccountMove(models.Model):
+
+    _inherit = "account.move"
+
+    def _compute_tax_totals(self):
+        for move in self:
+            tax_context = {'inverse_invoice_currency_rate': move.inverse_invoice_currency_rate}
+            for line in move.line_ids.filtered(lambda x: x.tax_fixed_amount_in_currency):
+                #tax_context[line.tax_line_id.id] = line.tax_fixed_amount_in_currency
+                tax_context[line.tax_line_id.id] = {
+                    'fixed_amount':line.tax_fixed_amount_in_currency,
+                    'rate': line.tax_fixed_amount / line.tax_fixed_amount_in_currency  
+                }
+            super(AccountMove, move.with_context(tax_context=tax_context))._compute_tax_totals()
+
+    # def button_draft(self):
+    #     for move in self:
+    #         tax_context = {'inverse_invoice_currency_rate': move.inverse_invoice_currency_rate}
+    #         for line in move.line_ids.filtered(lambda x: x.tax_fixed_amount_in_currency):
+    #             tax_context[line.tax_line_id.id] = line.tax_fixed_amount_in_currency
+    #         super(AccountMove, move.with_context(tax_context=tax_context)).button_draft()

account_invoice_tax/models/account_move_line.py

@@ -0,0 +1,8 @@
+from odoo import models, fields
+
+
+class AccountMoveLine(models.Model):
+    _inherit = "account.move.line"
+
+    tax_fixed_amount = fields.Float()
+    tax_fixed_amount_in_currency = fields.Float()

account_invoice_tax/models/account_tax.py

@@ -0,0 +1,27 @@
+from odoo import models, fields, api
+
+class AccountTax(models.Model):
+
+    _inherit = "account.tax"
+
+    @api.model
+    def _get_tax_totals_summary(self, base_lines, currency, company, cash_rounding=None):
+        res = super()._get_tax_totals_summary(base_lines, currency, company, cash_rounding=cash_rounding)
+        if 'tax_context' in self.env.context:
+            rate = self.env.context.get('inverse_invoice_currency_rate', 1)
+            for tax_groups in res['subtotals'][0]['tax_groups']:
+                for involved_tax_id in tax_groups['involved_tax_ids']:
+                    amount = self.env.context['tax_context'].get(involved_tax_id, {}).get('fixed_amount', 0.0)
+                    rate = self.env.context['tax_context'].get(involved_tax_id, {}).get('rate', 1.0)
+                    original_amount = tax_groups.get('tax_amount', {})
+                    if amount and amount != original_amount:
+                        tax_groups.update({
+                            'tax_amount': amount,
+                            'tax_amount_currency': amount
+                        })
+                        res['tax_amount'] += amount - original_amount
+                        res['total_amount'] += amount - original_amount
+                        res['tax_amount_currency'] += (amount - original_amount) * rate
+                        res['total_amount_currency'] += (amount - original_amount) * rate
+
+        return res

account_invoice_tax/wizards/account_invoice_tax.py

@@ -23,8 +23,15 @@ def default_get(self, fields):
         res["move_id"] = move_ids[0].id if move_ids else False
         lines = []
         for line in move_ids[0].line_ids.filtered(lambda x: x.tax_line_id):
+            is_in_company_currency = move_ids[0].currency_id == move_ids[0].company_currency_id
+            vals = {
+                "tax_id": line.tax_line_id.id,
+                "amount": line.amount_currency,
+                "new_tax": False,
+                'amount_company_currency': line.amount_currency if is_in_company_currency else line.debit or line.credit,
+            }
             lines.append(
-                Command.create({"tax_id": line.tax_line_id.id, "amount": line.amount_currency, "new_tax": False})
+                Command.create(vals)
             )
         res["tax_line_ids"] = lines
 
@@ -72,10 +79,15 @@ def action_update_tax(self):
                     and x.tax_repartition_line_id.tax_id.amount_type == "fixed"
                 ):
                     tax_line.write(fixed_taxes_bu.get(tax_line.tax_line_id))
+
                 for tax_line_id in self.tax_line_ids:
                     # seteamos valor al impuesto segun lo que puso en el wizard
                     line_with_tax = move.line_ids.filtered(lambda x: x.tax_line_id == tax_line_id.tax_id)
                     line_with_tax.write(tax_line_id._get_amount_updated_values())
+                    if line_with_tax.tax_repartition_line_id.tax_id.amount_type == "fixed":
+
+                        line_with_tax.tax_fixed_amount = tax_line_id.amount_company_currency if self.is_in_company_currency else tax_line_id.amount
+                        line_with_tax.tax_fixed_amount_in_currency = tax_line_id.amount
 
     def add_tax_and_new(self):
         self.add_tax()
@@ -101,9 +113,9 @@ class AccountInvoiceTaxLine(models.TransientModel):
     tax_id = fields.Many2one("account.tax", required=True)
     amount = fields.Float()
     amount_company_currency = fields.Float(
-        compute="_compute_amount_company_currency",
-        readonly=False,
-        store=True,
+        # compute="_compute_amount_company_currency",
+        # readonly=False,
+        # store=True,
     )
 
     new_tax = fields.Boolean(default=True)