# Taxjar

TaxJar provides a comprehensive sales tax API for real-time tax calculations, reporting, and filing.

- **Category:** taxes
- **Auth:** API_KEY
- **Tools:** 18
- **Triggers:** 0
- **Slug:** `TAXJAR`
- **Version:** 20260211_00

## Tools

### Calculate Sales Tax For An Order

**Slug:** `TAXJAR_CALCULATE_SALES_TAX_FOR_AN_ORDER`

Tool to calculate sales tax for an order. Use when you need an accurate tax calculation including nexus addresses, line items, shipping, and exemptions.

### Create Order Transaction

**Slug:** `TAXJAR_CREATE_ORDER_TRANSACTION`

Creates a new order transaction in TaxJar for sales tax reporting and compliance. This action records order transactions that will appear in the TaxJar dashboard for tax filing purposes. The transaction includes customer location, order amounts, shipping costs, and sales tax collected. Important: The 'amount' field must include shipping but exclude sales tax. If line_items are provided, their sum (quantity * unit_price - discount) must equal amount minus shipping.

### Create Refund Transaction

**Slug:** `TAXJAR_CREATE_REFUND_TRANSACTION`

Tool to create a new refund transaction. Use after confirming refund details.

### Delete Customer

**Slug:** `TAXJAR_DELETE_CUSTOMER`

Tool to delete an existing customer. Use when you need to remove a previously created customer by its ID. Example: "Delete customer cust_12345".

### Delete Order Transaction

**Slug:** `TAXJAR_DELETE_ORDER_TRANSACTION`

Tool to delete an existing order transaction. Use when you need to remove a previously created order transaction by its ID. Example: "Delete transaction abc123".

### Delete Refund Transaction

**Slug:** `TAXJAR_DELETE_REFUND_TRANSACTION`

Tool to delete an existing refund transaction. Use when you need to remove a previously created refund transaction by its ID. Example: "Delete refund 243345".

### List Customers

**Slug:** `TAXJAR_LIST_CUSTOMERS`

Lists all customer IDs from your TaxJar account. Returns a paginated list of customer IDs (strings). To get full details for a specific customer (including name, address, exemption type, etc.), use the customer ID with the 'Show Customer' action. Use this action to: - Browse all customers in your TaxJar account - Find customer IDs for further operations - Check which customers have been created

### List Nexus Regions

**Slug:** `TAXJAR_LIST_NEXUS_REGIONS`

Tool to list existing nexus regions for an account. Use after authenticating your account to discover where you have nexus for sales tax purposes.

### List Order Transactions

**Slug:** `TAXJAR_LIST_ORDER_TRANSACTIONS`

List order transaction IDs within a date range. Returns an array of transaction IDs (strings) for orders created between the specified dates. Use this to discover which orders exist in a date range, then use SHOW_ORDER_TRANSACTION to get details for specific IDs.

### List refund transactions

**Slug:** `TAXJAR_LIST_REFUND_TRANSACTIONS`

Lists refund transaction IDs within a specified date range. Returns an array of transaction IDs only. To get detailed information about a specific refund, use the 'Show refund transaction' action with the ID. Useful for finding refunds created through the TaxJar API within a specific time period.

### List Tax Categories

**Slug:** `TAXJAR_LIST_TAX_CATEGORIES`

Tool to list all product tax categories and their codes. Use when you need to discover available tax categories before assigning them to products.

### Show Customer

**Slug:** `TAXJAR_SHOW_CUSTOMER`

Tool to show an existing customer. Use when you need to retrieve details of a specific customer via TaxJar API.

### Show Order Transaction

**Slug:** `TAXJAR_SHOW_ORDER_TRANSACTION`

Tool to show an existing order transaction by ID. Use when you need to retrieve full details of a specific order transaction after creation or listing.

### Show Refund Transaction

**Slug:** `TAXJAR_SHOW_REFUND_TRANSACTION`

Retrieves detailed information about a specific refund transaction from TaxJar. Use this tool when you need to: - View complete details of a refund transaction including amounts, addresses, and line items - Verify refund transaction data that was previously created - Audit refund information for tax reporting purposes Requires a valid transaction_id that was previously created through TaxJar's API.

### Show Tax Rates for a Location

**Slug:** `TAXJAR_SHOW_TAX_RATES_FOR_A_LOCATION`

Tool to show sales tax rates for a location. Use when you need to retrieve sales tax rates for a specific ZIP code with optional address details (city, state, country, street).

### Summarize Tax Rates for All Regions

**Slug:** `TAXJAR_SUMMARIZE_TAX_RATES_FOR_ALL_REGIONS`

Tool to retrieve minimum and average sales tax rates by region. Use when you need a backup of regional tax summary rates.

### Update Order Transaction

**Slug:** `TAXJAR_UPDATE_ORDER_TRANSACTION`

Tool to update an existing order transaction. Use when adjusting order details such as amount, shipping, or line items after creation.

### Validate VAT Number

**Slug:** `TAXJAR_VALIDATE_VAT_NUMBER`

Validates EU VAT identification numbers against the VIES (VAT Information Exchange System) database. Use this tool to: - Verify VAT number format and validity - Check if a VAT number is registered and active in the EU - Retrieve associated company name and address when available - Confirm tax-exempt eligibility before processing transactions The validation queries the European VIES database when available, returning company details for valid registrations. When VIES is unavailable, it falls back to format-based validation using regex patterns.
