When creating prices in Stripe, you should disable the “Include tax in price” option so the proper tax rates can be added by Spark.
Features::euVatCollection() line within your application’s config/spark.php configuration file. The value provided for the home-country option should be the two-character country code corresponding to the country where your business is located:
Spark does not currently support Stripe Tax. You should disable Stripe Tax via your Stripe dashboard when using Spark.