diff --git a/account_de.xml b/account_de.xml
index c56fb44b25..921ef4a9e6 100644
--- a/account_de.xml
+++ b/account_de.xml
@@ -10136,14 +10136,14 @@
             <field name="rate" eval="Decimal('-.19')"/>
             <field name="invoice_account" ref="account_1774"/>
             <field name="invoice_base_code" ref="tax_code_89"/>
-            <field name="invoice_base_sign" eval="-1"/>
+            <field name="invoice_base_sign" eval="Decimal('-1')"/>
             <field name="invoice_tax_code" ref="tax_code_891"/>
-            <field name="invoice_tax_sign" eval="-1"/>
+            <field name="invoice_tax_sign" eval="Decimal('-1')"/>
             <field name="credit_note_account" ref="account_1774"/>
             <field name="credit_note_base_code" ref="tax_code_89"/>
-            <field name="credit_note_base_sign" eval="-1"/>
+            <field name="credit_note_base_sign" eval="Decimal('-1')"/>
             <field name="credit_note_tax_code" ref="tax_code_891"/>
-            <field name="credit_note_tax_sign" eval="-1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('-1')"/>
             <field name="parent" ref="tax_eu_19_purchase"/>
         </record>
         <record model="account.tax.template" id="tax_eu_19_purchase_vst">
@@ -10153,13 +10153,13 @@
             <field name="type">percentage</field>
             <field name="rate" eval="Decimal('.19')"/>
             <field name="invoice_account" ref="account_1574"/>
-            <field name="invoice_base_sign" eval="-1"/>
+            <field name="invoice_base_sign" eval="Decimal('-1')"/>
             <field name="invoice_tax_code" ref="tax_code_61"/>
-            <field name="invoice_tax_sign" eval="-1"/>
+            <field name="invoice_tax_sign" eval="Decimal('-1')"/>
             <field name="credit_note_account" ref="account_1574"/>
-            <field name="credit_note_base_sign" eval="-1"/>
+            <field name="credit_note_base_sign" eval="Decimal('-1')"/>
             <field name="credit_note_tax_code" ref="tax_code_61"/>
-            <field name="credit_note_tax_sign" eval="-1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('-1')"/>
             <field name="parent" ref="tax_eu_19_purchase"/>
         </record>
         <record model="account.tax.template" id="tax_eu_7_purchase">
@@ -10177,14 +10177,14 @@
             <field name="rate" eval="Decimal('-.07')"/>
             <field name="invoice_account" ref="account_1772"/>
             <field name="invoice_base_code" ref="tax_code_89"/>
-            <field name="invoice_base_sign" eval="-1"/>
+            <field name="invoice_base_sign" eval="Decimal('-1')"/>
             <field name="invoice_tax_code" ref="tax_code_931"/>
-            <field name="invoice_tax_sign" eval="-1"/>
+            <field name="invoice_tax_sign" eval="Decimal('-1')"/>
             <field name="credit_note_account" ref="account_1772"/>
             <field name="credit_note_base_code" ref="tax_code_89"/>
-            <field name="credit_note_base_sign" eval="-1"/>
+            <field name="credit_note_base_sign" eval="Decimal('-1')"/>
             <field name="credit_note_tax_code" ref="tax_code_931"/>
-            <field name="credit_note_tax_sign" eval="-1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('-1')"/>
             <field name="parent" ref="tax_eu_7_purchase"/>
         </record>
         <record model="account.tax.template" id="tax_eu_7_purchase_vst">
@@ -10194,13 +10194,13 @@
             <field name="type">percentage</field>
             <field name="rate" eval="Decimal('.07')"/>
             <field name="invoice_account" ref="account_1572"/>
-            <field name="invoice_base_sign" eval="-1"/>
+            <field name="invoice_base_sign" eval="Decimal('-1')"/>
             <field name="invoice_tax_code" ref="tax_code_61"/>
-            <field name="invoice_tax_sign" eval="-1"/>
+            <field name="invoice_tax_sign" eval="Decimal('-1')"/>
             <field name="credit_note_account" ref="account_1572"/>
-            <field name="credit_note_base_sign" eval="-1"/>
+            <field name="credit_note_base_sign" eval="Decimal('-1')"/>
             <field name="credit_note_tax_code" ref="tax_code_61"/>
-            <field name="credit_note_tax_sign" eval="-1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('-1')"/>
             <field name="parent" ref="tax_eu_7_purchase"/>
         </record>
         <record model="account.tax.template" id="tax_eu_sale">
@@ -10212,12 +10212,12 @@
             <field name="rate" eval="Decimal('0')"/>
             <field name="invoice_account" ref="account_1770"/>
             <field name="invoice_base_code" ref="tax_code_41"/>
-            <field name="invoice_base_sign" eval="1"/>
-            <field name="invoice_tax_sign" eval="1"/>
+            <field name="invoice_base_sign" eval="Decimal('1')"/>
+            <field name="invoice_tax_sign" eval="Decimal('1')"/>
             <field name="credit_note_account" ref="account_1770"/>
             <field name="credit_note_base_code" ref="tax_code_41"/>
-            <field name="credit_note_base_sign" eval="1"/>
-            <field name="credit_note_tax_sign" eval="1"/>
+            <field name="credit_note_base_sign" eval="Decimal('1')"/>
+            <field name="credit_note_tax_sign" eval="Decimal('1')"/>
         </record>
         <record model="account.tax.template" id="tax_export">
             <field name="name">Steuerfreie Ausfuhr (§4 Nr. 1a UStG)</field>
@@ -10228,12 +10228,12 @@
             <field name="rate" eval="Decimal('0')"/>
             <field name="invoice_account" ref="account_1770"/>
             <field name="invoice_base_code" ref="tax_code_43"/>
-            <field name="invoice_base_sign" eval="1"/>
-            <field name="invoice_tax_sign" eval="1"/>
+            <field name="invoice_base_sign" eval="Decimal('1')"/>
+            <field name="invoice_tax_sign" eval="Decimal('1')"/>
             <field name="credit_note_account" ref="account_1770"/>
             <field name="credit_note_base_code" ref="tax_code_43"/>
-            <field name="credit_note_base_sign" eval="1"/>
-            <field name="credit_note_tax_sign" eval="1"/>
+            <field name="credit_note_base_sign" eval="Decimal('1')"/>
+            <field name="credit_note_tax_sign" eval="Decimal('1')"/>
         </record>
         <record model="account.tax.template" id="tax_import_19">
             <field name="name">19% Einfuhrumsatzsteuer</field>
@@ -10244,14 +10244,14 @@
             <field name="rate" eval="Decimal('.19')"/>
             <field name="invoice_account" ref="account_1588"/>
             <field name="invoice_base_code" ref="tax_code_BAUS19"/>
-            <field name="invoice_base_sign" eval="-1"/>
+            <field name="invoice_base_sign" eval="Decimal('-1')"/>
             <field name="invoice_tax_code" ref="tax_code_62"/>
-            <field name="invoice_tax_sign" eval="-1"/>
+            <field name="invoice_tax_sign" eval="Decimal('-1')"/>
             <field name="credit_note_account" ref="account_1588"/>
             <field name="credit_note_base_code" ref="tax_code_BAUS19"/>
-            <field name="credit_note_base_sign" eval="-1"/>
+            <field name="credit_note_base_sign" eval="Decimal('-1')"/>
             <field name="credit_note_tax_code" ref="tax_code_62"/>
-            <field name="credit_note_tax_sign" eval="-1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('-1')"/>
         </record>
         <record model="account.tax.template" id="tax_import_7">
             <field name="name">7% Einfuhrumsatzsteuer</field>
@@ -10262,14 +10262,14 @@
             <field name="rate" eval="Decimal('.07')"/>
             <field name="invoice_account" ref="account_1588"/>
             <field name="invoice_base_code" ref="tax_code_BAUS7"/>
-            <field name="invoice_base_sign" eval="-1"/>
+            <field name="invoice_base_sign" eval="Decimal('-1')"/>
             <field name="invoice_tax_code" ref="tax_code_62"/>
-            <field name="invoice_tax_sign" eval="-1"/>
+            <field name="invoice_tax_sign" eval="Decimal('-1')"/>
             <field name="credit_note_account" ref="account_1588"/>
             <field name="credit_note_base_code" ref="tax_code_BAUS7"/>
-            <field name="credit_note_base_sign" eval="-1"/>
+            <field name="credit_note_base_sign" eval="Decimal('-1')"/>
             <field name="credit_note_tax_code" ref="tax_code_62"/>
-            <field name="credit_note_tax_sign" eval="-1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('-1')"/>
         </record>
         <record model="account.tax.template" id="tax_not_taxable">
             <field name="name">nicht steuerbar</field>
@@ -10279,12 +10279,12 @@
             <field name="rate" eval="Decimal('0')"/>
             <field name="invoice_account" ref="account_1770"/>
             <field name="invoice_base_code" ref="tax_code_45"/>
-            <field name="invoice_base_sign" eval="1"/>
-            <field name="invoice_tax_sign" eval="1"/>
+            <field name="invoice_base_sign" eval="Decimal('1')"/>
+            <field name="invoice_tax_sign" eval="Decimal('1')"/>
             <field name="credit_note_account" ref="account_1770"/>
             <field name="credit_note_base_code" ref="tax_code_45"/>
-            <field name="credit_note_base_sign" eval="1"/>
-            <field name="credit_note_tax_sign" eval="1"/>
+            <field name="credit_note_base_sign" eval="Decimal('1')"/>
+            <field name="credit_note_tax_sign" eval="Decimal('1')"/>
         </record>
         <record model="account.tax.template" id="tax_ust_19">
             <field name="name">19% Umsatzsteuer</field>
@@ -10295,14 +10295,14 @@
             <field name="rate" eval="Decimal('.19')"/>
             <field name="invoice_account" ref="account_1776"/>
             <field name="invoice_base_code" ref="tax_code_81"/>
-            <field name="invoice_base_sign" eval="1"/>
+            <field name="invoice_base_sign" eval="Decimal('1')"/>
             <field name="invoice_tax_code" ref="tax_code_811"/>
-            <field name="invoice_tax_sign" eval="1"/>
+            <field name="invoice_tax_sign" eval="Decimal('1')"/>
             <field name="credit_note_account" ref="account_1776"/>
             <field name="credit_note_base_code" ref="tax_code_81"/>
-            <field name="credit_note_base_sign" eval="1"/>
+            <field name="credit_note_base_sign" eval="Decimal('1')"/>
             <field name="credit_note_tax_code" ref="tax_code_811"/>
-            <field name="credit_note_tax_sign" eval="1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('1')"/>
         </record>
         <record model="account.tax.template" id="tax_ust_7">
             <field name="name">7% Umsatzsteuer</field>
@@ -10313,14 +10313,14 @@
             <field name="rate" eval="Decimal('.07')"/>
             <field name="invoice_account" ref="account_1771"/>
             <field name="invoice_base_code" ref="tax_code_86"/>
-            <field name="invoice_base_sign" eval="1"/>
+            <field name="invoice_base_sign" eval="Decimal('1')"/>
             <field name="invoice_tax_code" ref="tax_code_861"/>
-            <field name="invoice_tax_sign" eval="1"/>
+            <field name="invoice_tax_sign" eval="Decimal('1')"/>
             <field name="credit_note_account" ref="account_1771"/>
             <field name="credit_note_base_code" ref="tax_code_86"/>
-            <field name="credit_note_base_sign" eval="1"/>
+            <field name="credit_note_base_sign" eval="Decimal('1')"/>
             <field name="credit_note_tax_code" ref="tax_code_861"/>
-            <field name="credit_note_tax_sign" eval="1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('1')"/>
         </record>
         <record model="account.tax.template" id="tax_vst_19">
             <field name="name">19% Vorsteuer</field>
@@ -10331,14 +10331,14 @@
             <field name="rate" eval="Decimal('.19')"/>
             <field name="invoice_account" ref="account_1576"/>
             <field name="invoice_base_code" ref="tax_code_BRV19"/>
-            <field name="invoice_base_sign" eval="-1"/>
+            <field name="invoice_base_sign" eval="Decimal('-1')"/>
             <field name="invoice_tax_code" ref="tax_code_66"/>
-            <field name="invoice_tax_sign" eval="-1"/>
+            <field name="invoice_tax_sign" eval="Decimal('-1')"/>
             <field name="credit_note_account" ref="account_1576"/>
             <field name="credit_note_base_code" ref="tax_code_BRV19"/>
-            <field name="credit_note_base_sign" eval="-1"/>
+            <field name="credit_note_base_sign" eval="Decimal('-1')"/>
             <field name="credit_note_tax_code" ref="tax_code_66"/>
-            <field name="credit_note_tax_sign" eval="-1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('-1')"/>
         </record>
         <record model="account.tax.template" id="tax_vst_7">
             <field name="name">7% Vorsteuer</field>
@@ -10349,14 +10349,14 @@
             <field name="rate" eval="Decimal('.07')"/>
             <field name="invoice_account" ref="account_1571"/>
             <field name="invoice_base_code" ref="tax_code_BRV7"/>
-            <field name="invoice_base_sign" eval="-1"/>
+            <field name="invoice_base_sign" eval="Decimal('-1')"/>
             <field name="invoice_tax_code" ref="tax_code_66"/>
-            <field name="invoice_tax_sign" eval="-1"/>
+            <field name="invoice_tax_sign" eval="Decimal('-1')"/>
             <field name="credit_note_account" ref="account_1571"/>
             <field name="credit_note_base_code" ref="tax_code_BRV7"/>
-            <field name="credit_note_base_sign" eval="-1"/>
+            <field name="credit_note_base_sign" eval="Decimal('-1')"/>
             <field name="credit_note_tax_code" ref="tax_code_66"/>
-            <field name="credit_note_tax_sign" eval="-1"/>
+            <field name="credit_note_tax_sign" eval="Decimal('-1')"/>
         </record>
         <record model="account.tax.rule.template" id="tax_rule_eu_no_id_purchase">
             <field name="name">Lieferant EU (ohne Ust-ID)</field>