Shopify's Duties and Import Tax estimations in checkout now supports applying clothing based tax exemptions in Massachusetts, Minnesota, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont.
When a buyer purchases a clothing product with a shipping destination in those states, and the cart is within the value thresholds of the exemption, taxes for eligible product will be set to 0%. Clothing products are identified using Shopify's product categories.
You can learn more about collecting duties and import taxes in checkout on the Shopify Help Docs.