Order Summary Box does not update with tax

Hey guys!
I have an ecommerce here in Europe and we have some different fees and charges. When we put, for example, some address in FRANCE and that have a valid TVA number (for companies), this tax must be withdrawn.

I have a plugin to check and discount this TVA. The fact is that the order summary box does not update the TVA when the address is added (in the billing data step).

My checkout steps are:

1. Contact details
2. Billing data
3. Payment method

I looked in your documentation for something about this problem, but I think it’s too specific.

Website: https://metawebsolution.com (registration is required before purchasing, as our sales flow is monitored with the customer by telephone).

Can you help me please?

Thanks in advance.

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