We are powered by Stripe and they accept all major debit and credit card payments(Visa, American Express, Mastercard) and other local payments solutions.
tabExtend will pay the local sales tax out of our end so no, you don't need to pay any sales tax.
All payments and security are handled by Stripe. We never see or touch your credit card information. Stripe is PCI-certified and all card numbers are encrypted at rest with AES-256, read more at stripe.com
If you for any reason want to cancel your plan we have a 30-day full refund policy.