[GraphQl] Selected shipping method does not contain value including tax.

[Hexmage]

Preconditions (*)

1. Magento 2.4.1 (also present in at least 2.3.5p2)

Steps to reproduce (*)

1. Enable the shipping method flatrate and set its price to 10
2. Configure a default tax class for shipping that's not 0%. My example is 21%
3. Set tax/calculation/shipping_includes_tax to "Including Tax"
4. Set tax/cart_display/shipping to "Including Tax"
5. Set tax/display/shipping to "Including Tax"
6. Create a Cart through GraphQl
7. Add a product to your cart through GraphQl
8. Set a Shipping Address on your cart through GraphQl
9. Set flatrate/flatrate as your shipping method through GraphQl using the following query.

mutation setShippingMethodsOnCart(
    $cartId: String!, 
) {
    setShippingMethodsOnCart(
        input: {
            cart_id: $cartId, 
            shipping_methods:[{
		carrier_code:"flatrate",
		method_code:"flatrate"
	    }]
        }
    ) {
        cart {
            shipping_addresses {
                selected_shipping_method {
                    amount {
                        currency
                        value
                    }
                }
            }
        }
    }
}

Expected result (*)

{
    "data": {
        "setShippingMethodsOnCart": {
            "cart": {
                "shipping_addresses": [
                    {
                        "selected_shipping_method": {
                            "amount": {
                                "currency": "EUR",
                                "value": 10.00
                            }
                        }
                    }
                ]
            }
        }
    }
}

Actual result (*)

{
    "data": {
        "setShippingMethodsOnCart": {
            "cart": {
                "shipping_addresses": [
                    {
                        "selected_shipping_method": {
                            "amount": {
                                "currency": "EUR",
                                "value": 8.26
                            }
                        }
                    }
                ]
            }
        }
    }
}

There is currently no way to get the value of the selected shipping method including tax. This is a value you want for all countries where its normal to display prices including tax (most if not all EU countries) . Currently the only way to get the value (without code changes) is to match the selected shipping method with available shipping methods and get the price incl tax from there.

I'm not certain if the way forward is giving both values to the endpoint or based on configuration change the response of selected_shipping_method { amount { value }}.

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[m2-assistant]

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[itisraza]

Hi @Hexmage, I think you need to include the following constructs in your input request

    price_excl_tax {
      value
      currency
    }
    price_incl_tax {
      value
      currency
    }

Hope this will help

Regards,
Raza.

[Hexmage]

@itisraza those only exist for AvailibleShippingMethods, I want them on SelectedShippingMethod.

[m2-assistant]

Hi @sasha19957099. Thank you for working on this issue.
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