Tier pricing on configurables inc/ex vat prices are the same value

[PhilipRowe]

Preconditions (*)

1. Magento 2.4.2-p1

Steps to reproduce (*)

1. Go to Admin > Configuration > Sales > Tax
2. Display settings > Display Product Prices In Catalog > set to: Including and Excluding Tax
3. Calculation settings > Catalog Prices > Set to: Including Tax
4. Setup tax rules so that prices have a tax amount showing
5. Go to a configurable product on the frontend with tier pricing setup

Expected result (*)

1. Tier prices show Inc and Ex tax prices that are different

Actual result (*)

1. Tier prices show Inc and Ex tax prices that are the same values
   

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• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

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When pricing is set to display both and catalog prices include tax there is an issue where on configurable products tiered prices inc and ex vat prices are the same value (both inc)

vendor/magento/module-catalog/Pricing/Price/TierPrice.php getTierPriceList()
is: $exclTaxPrice = $this->calculator->getAmount($priceData['price'], $this->product, true);
should be: $exclTaxPrice = $this->calculator->getAmount($priceData['price'], $this->product);

The true param is meaning that the adjustments aren't being accounted for and therefore the price is always including vat

[m2-assistant]

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[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
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[engcom-November]

Verified the issue on Magento 2.4-develop branch having B2B and EE Modules and the issue is reproducible:
Steps to reproduce:

1. Go to Admin > Configuration > Sales > Tax
   Display settings > Display Product Prices In Catalog > set to: Including and Excluding Tax
   Calculation settings > Catalog Prices > Set to: Including Tax
2. Setup tax rules so that prices have a tax amount showing (Stores - Taxes - Tax Zones and Rates, Tax Rules)
3. Go to a configurable product with tier pricing setup (Catalog - Products - Configurable Product)
   (Advanced Pricing - Enter Tier Price and save)
   Or create new Configurable product with Tier Price Setup - Create Configurations - Select Attribute - Generate Products and / under Actions - Choose Different Product - Select Simple Product having Tier Price setup and Save the Product)
   5 - Navigate to Frontend - Product Details page of Configurable Product
   Issue: Tier prices show Inc and Ex tax prices that are the same values
   

Note: This issue is not observed for Simple Products having no configurations:
Expected behavior:

[magento-engcom-team]

✅ Confirmed by @engcom-November
Thank you for verifying the issue. Based on the provided information internal tickets MC-43022 were created

Issue Available: @engcom-November, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.