Subscription renewal does not update amount when VAT is applied

[asimmukhtar1]

Description:
We have encountered an issue where subscription renewals continue to use the original amount set at the time the subscription was created, even if the customer’s VAT ID status changes and Magento calculates a different total for subsequent orders.

Used versions

• Magento Commerce 2.4.6-p12:
• Enterprise:
• *Mollie version 1.14.0 *:

Steps to reproduce

1. Customer places first subscription order without a valid VAT ID.
   • Example: Order total = €60 (including VAT).
   • Mollie subscription is created with amount = €60.
2. Customer later adds a valid VAT ID.
   • Magento correctly recalculates the order total for new orders = €50 (VAT exempt).
3. When the subscription renews, Mollie still charges €60.Expected behavior
   When the customer’s VAT ID status changes, future subscription renewals should reflect the new Magento-calculated total (e.g., €50 instead of €60).

Actual behavior
Renewals continue using the original amount stored in the Mollie subscription at creation time (€60).