Changes to the existing Tax rule will be applicable to all future billings?

[Customer Query] -

The tax amount has been changed in the settings - will this amount be added to all future billing?

If the changes are updated to the existing Tax rule then it will be applicable to all Products & Plans in the system i.e. along with new purchases the newly updated tax will also be applicable for all future/recurring billings. As the Tax Module is one of the unique inbuilt features that allow implying Tax system on each purchase in Pabbly Subscription Billing. Users can "Create Tax" & "Tax Rules" on the basis of countries & states i.e. any type of rule can be applied according to the government rules of any particular country/region.

To know more, please check this doc - https://www.pabbly.com/subscriptions/docs/tax-module/