Zno only collects CA sales tax on orders shipped to California, United States.
If you have a valid CA Seller's Permit, you can be exempt from paying CA sales tax at order checkout by completing and signing a CA Resale Certificate.
Please download the form here (if you have not already done so) by clicking the link below.
https://www.cdtfa.ca.gov/formspubs/cdtfa230.pdf
Once you have completed and signed the form, please email it to support@zno.com. Allow 1-2 days for verification before your account is marked exempt from CA sales tax.
If you have a Seller's Permit outside of California, and shipping to a client in California - you are not eligible for the CA sales tax refund and cannot be exempt.