To fully comply with regulatory requirements, we need to support an additional category called "Reduced Tax Rate" when a product line has a Reduced VAT rate (e.g., 20%) for sales of goods and services to final consumers when payment is made by debit card or electronic money instrument (and other specific reductions in similar cases).

1. Detecting "Reduced Tax Rate":
* Identify product lines with a VAT rate that is neither 0% (exempt), 10% (minimum), nor 22% (basic). Any VAT rate outside these three should be considered "Reduced Tax Rate".
2. Modifying XML Output:
* In the <Totales> section of the XML, include the total amount of VAT under the "Reduced Tax Rate" in the <MntIVAOtra> tag.
* Example: xml <MntIVAOtra>140</MntIVAOtra>  (where 140 corresponds to the VAT calculated at the reduced tax rate, e.g., 20%).
* For each product line using "Reduced Tax Rate," set the <IndFact> tag to 4: xml <IndFact>4</IndFact> 
        *Ensure the total amount reflects the base amount plus the VAT under "Reduced Tax Rate".
3. Tax Grid for Configuration:
*Add a new tax grid called Sales Reduced VAT to be used for the tax configuration of the "Reduced Tax Rate."
* This will ensure proper reporting and consistency in tax declarations.
* The new tax grid should be selectable when configuring other taxes.
Odoo Implementation Considerations:
* The tax computation logic in Odoo already supports defining taxes at different rates.
* Adapt the XML generation logic to check for product lines with a non-standard VAT rate and apply the necessary modifications. Ensure the final totals in the XML align with Odoo's computed tax amounts.
Task latam side: 1330
Task Adhoc side: 52999

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Forward-Port-Of: odoo/odoo#231642
Forward-Port-Of: odoo/odoo#221073

1) Detecting "Reduced Tax Rate":
* Identify product lines with a VAT rate that is neither 0% (exempt), 10% (minimum), nor 22% (basic). Any VAT rate outside these three should be considered "Reduced Tax Rate". 
2) Modifying XML Output:
* In the `<Totales>` section of the XML, include the total amount of VAT under the "Reduced Tax Rate" in the `<MntIVAOtra>` tag.
* Example: ```xml <MntIVAOtra>140</MntIVAOtra> ``` (where 140 corresponds to the VAT calculated at the reduced tax rate, e.g., 20%).
* For each product line using "Reduced Tax Rate," set the `<IndFact>` tag to `4`: ```xml <IndFact>4</IndFact> ```
    * Ensure the total amount reflects the base amount plus the VAT under "Reduced Tax Rate". 

3) Tax Grid for Configuration:
* Add a new tax grid called Sales Reduced VAT to be used for the tax configuration of the "Reduced Tax Rate."
* This will ensure proper reporting and consistency in tax declarations.
* The new tax grid should be selectable when configuring other taxes. 
Odoo Implementation Considerations:
* The tax computation logic in Odoo already supports defining taxes at different rates.
* Adapt the XML generation logic to check for product lines with a non-standard VAT rate and apply the necessary modifications. Ensure the final totals in the XML align with Odoo's computed tax amounts.

Task latam side: 1330
Task Adhoc side: 52999

Forward-Port-Of: odoo/enterprise#97223
Forward-Port-Of: odoo/enterprise#91392