About this plugin
Galvix is your dedicated compliance team — handling setup, nexus monitoring, state registrations, monthly filing, and notices on your behalf.
Galvix Tax connects your WooCommerce store to Galvix to calculate sales tax in real time.
Important: This plugin requires a Galvix account and a Galvix API token. It sends cart and address data to Galvix’s servers in order to calculate tax. Please read the “External services” section below before installing, so you know exactly what is transmitted and when.
What the Galvix service does
Multi-State Nexus
We continuously monitor economic and physical nexus exposure across all 50 states and flag new thresholds before they create an obligation.
State Registrations
We handle every state registration on your behalf — forms, portals, and credentials — so you’re legally ready to file before your first return is due.
Product Taxability
We map every product in your catalog to the correct tax category for each state, and keep those mappings current as rules change.
Return Filing
We prepare every return, reconcile your transaction data, apply deductions, and file across all your states on the correct schedule — monthly, quarterly, or annual depending on the state.
Exemption Management
We collect, verify, and store exemption certificates from your exempt customers, and proactively follow up before they expire.
State Notices
We handle any notices or correspondence received from the states and shared by the customer.
How we’re different
A compliance team. Not another tool to operate.
How plugin works
- A customer adds products to the cart and enters a destination address. Tax is calculated based on the provided address.
- On each totals recalculation, the plugin sends the destination address, the product IDs, the per line amounts, and the shipping amount to the Galvix Tax API.
- Galvix returns a total tax amount plus a per line item tax amount.
- The plugin applies each returned amount to the matching cart line item and updates the cart total.
- At checkout, the same amounts are written to the order’s line items and saved to order meta under _galvix_tax_data.
If a request fails or the API returns an error, the plugin logs it and makes no change to the totals. Whatever WooCommerce calculated from your own tax rate settings is what the customer sees.
External services
This plugin relies on the Galvix Tax API, a third party service operated by Galvix, to calculate sales tax. The plugin does not function without it.
What the service is used for
Calculating the sales tax owed on a WooCommerce cart or order, based on the customer’s destination address and the items being purchased.
What data is sent, and when
com/v1/taxes/calculate in the following situations:
- Every time WooCommerce recalculates cart or checkout totals
- When an order is recalculated in the WordPress admin using the “Recalculate” button
- When an order is saved or updated in the WordPress admin
- When an administrator clicks “Test Connection” on the plugin settings screen. This sends a fixed sample address and a single 100.00 test item. No real customer data is included.
Each request contains:
- Destination address: country, state, city, postcode, and address lines 1 and 2, taken from the customer’s shipping address, falling back to their billing address
- Address type: whether the address above is the shipping or the billing address
- Customer identifier: the WordPress user ID for logged in customers, or the billing email address for guest customers
- Line items: the WooCommerce product ID and the line total for each item in the cart or order
- Shipping amount: the shipping total for the cart or order
- Currency: the transaction currency code, supports usd in this release.
- Your Galvix API token, sent as an HTTP Authorization: Bearer header
- A User-Agent header identifying the plugin and its version
Note that for guest checkouts the customer identifier is an email address, which is personal data. No product names, SKUs, categories, customer names, or payment details are transmitted.
Requests are sent over HTTPS with SSL certificate verification enabled.
Service links
- Service: https://www.galvix.com
- Documentation: https://docs.galvix.com/article/239-integrate-galvix-woocommerce
- Terms and conditions: https://www.galvix.com/terms-and-conditions/
- Privacy policy: https://www.galvix.com/privacy-policy/