Admin, Security & Settings · Synthetic Property 1

External Systems & Add-ons

Customer-configurable optional connections and paid add-ons.

Marketplace Connections Setup Guide Credentials Mapping Tests Health Operations Entitlements API Keys & Webhooks Usage

Setup guide · External Tax Service

Rates; rules; returns; jurisdiction content

What you need first

A tax service account and the keys it gives for calculating and filing sales tax.

Find your provider's instructions for the keys (opens a web search). Look for words like API keys, integrations or developer settings in your provider's admin area.

If you don't have a provider yet, the built-in feature keeps working. Your own provider's help is the source of truth.

The steps

Open External Systems & Add-ons, Marketplace and choose External Tax Service.
Get the details above from your provider. Keep them private; never put them in a message or note.
Paste them into the connection form. They are stored separately for Test and Live.
Allow only what this connection needs: Rates; rules; returns; jurisdiction content.
Match your provider's names to ours on the Mapping tab, then press Test.
It shows Connected only after the test passes. Watch its Health, and use Safe Disable to turn it off at any time.

Technical steps from the build package

Settings > External Systems & Add-ons > Marketplace: activate External Tax Service (paid add-on where applicable).
Enter the credentials your provider gives you (kept separate per environment).
Grant only these permissions: Rates; rules; returns; jurisdiction content.
Map codes and fields on the Mapping tab.
Run Test; status becomes Connected only after a pass.
Watch Health; use Safe Disable to turn it off.

Without this connection: Customer configuration controls applicability.

Degraded: warnings, partial sync, fallback for impaired functions. Down: Customer configuration controls applicability; queued writes replay safely on recovery.