I see. Stripe actually does not help with taxes at all. All the work is left for users to figure out, configure and file.
Kable uses Stripe's Invoice API directly (we don't create Stripe subscriptions which would cost an extra 0.5%). You can set up Stripe Tax to work with Invoices, and I believe most of what you'd want happens automatically.
I may be wrong though -- please let me know if you've had a different experience!