We're here to help. Most issues can be resolved quickly with our documentation — but if you need us, we're just a message away.
Most questions are answered in our documentation. Try these first:
Getting started guide, HS codes explained, TCA, IOSS, de minimis, and widget setup.
Read the docs →Widget not showing? Step-by-step guide to diagnose and fix the most common issues.
Fix my widget →Compare plans, understand calculation limits, and find the right tier for your store.
View pricing →Read reviews from other merchants or leave your own review on the App Store listing.
View on App Store →Can't find the answer? We typically respond within one business day.
Send us a message via the Shopify App Store contact form. Include your store URL and a description of the issue for the fastest response.
Contact via App Store →Enjoying Tax & Duty King? A review on the Shopify App Store helps other merchants discover the app and helps us keep improving it.
Write a review →Have an idea for a new feature or country you'd like us to support? We'd love to hear it. Send us a message via the App Store and we'll add it to our roadmap.
Support hours: Monday–Friday, 09:00–17:00 GMT. We aim to respond within 1 business day.