--- title: Avalara AvaTax API Integration on Truto slug: avalara category: Accounting canonical: "https://truto.one/integrations/detail/avalara/" --- # Avalara AvaTax API Integration on Truto **Category:** Accounting **Status:** Generally available ## Unified APIs ### Unified User Directory API - **Organizations** — Organizations are the top level entity in the source application. Users are associated with an organization. - **Roles** — The Role object represents a role of a User. - **Users** — The User object represents a User. - **Workspaces** — Workspaces represent concepts like teams, workspaces, projects in apps that support them ## How it works 1. **Link your customer's Avalara AvaTax account.** Use Truto's frontend SDK; we handle every OAuth and API key flow so you don't need to create the OAuth app. 2. **Authentication is automatic.** Truto refreshes tokens, stores credentials securely, and injects them into every API request. 3. **Call Truto's API to reach Avalara AvaTax.** The Proxy API is a 1-to-1 mapping of the Avalara AvaTax API. 4. **Get a unified response format.** Every response uses a single shape, with cursor-based pagination and data in the `result` field. ## Use cases - **Automate real-time tax calculation at checkout or invoice generation** — SaaS billing platforms, e-commerce tools, and POS systems can connect their customers' Avalara AvaTax accounts to calculate accurate sales tax, VAT, or GST in real time — eliminating manual rate lookups across thousands of jurisdictions. - **Embed tax-aware quoting in CPQ and CRM workflows** — Quote-to-cash platforms can send uncommitted transactions to AvaTax for tax estimates during the quoting phase, then automatically commit them when a deal closes — giving sales teams accurate, tax-inclusive pricing without leaving their workflow. - **Validate exemption certificates for B2B transactions** — Wholesale marketplaces and procurement platforms can verify buyers' resale or non-profit exemption certificates through Avalara CertCapture before calculating tax, ensuring compliant zero-tax transactions without manual certificate management. - **Centralize tax liability reporting across multiple sales channels** — Accounting and ERP platforms can push finalized invoices from disparate channels into their customers' AvaTax accounts, giving merchants a single source of truth for tax liability and streamlined return preparation. - **Accrue consumer use tax on supplier invoices** — Spend management and AP automation platforms can route supplier invoices through AvaTax to detect under-charged tax and automatically accrue use tax — keeping their customers compliant without manual audits. ## What you can build - **One-click AvaTax account connection** — Let your end users securely connect their Avalara AvaTax account from your product's settings page, with Truto handling credential management and authentication lifecycle. - **Inline tax calculation on invoices and carts** — Display jurisdiction-level tax breakdowns in real time during checkout or invoice creation by routing transaction data through your customer's connected AvaTax instance. - **Automated transaction commit on payment capture** — Automatically finalize and lock AvaTax transactions when payment is captured, ensuring your customers' tax ledgers stay in sync with actual revenue events. - **Address validation and jurisdiction resolution** — Validate shipping and billing addresses against Avalara's geospatial engine before tax calculation to guarantee rooftop-level accuracy and eliminate tax miscalculations. - **Exemption certificate-aware pricing** — Automatically apply tax exemptions at checkout by checking the buyer's customer code against active certificates in Avalara CertCapture — no manual overrides required. - **Refund and adjustment sync** — Propagate returns and credit memos from your platform to AvaTax with original transaction date overrides, so your customers' tax liability ledgers reflect accurate refund amounts. ## FAQs ### What authentication method does Avalara AvaTax use? Avalara AvaTax REST v2 supports HTTP Basic Authentication (username + password or account ID + license key) and OAuth 2.0 bearer tokens. Truto manages the credential storage and token lifecycle so your end users can connect their accounts securely. ### Are there specific Truto tools or Unified API resources available for Avalara AvaTax today? Avalara AvaTax tools are built on request. Truto can map AvaTax capabilities — such as CreateTransaction, CommitTransaction, ResolveAddress, and exemption certificate lookups — to your integration needs. Contact us to scope the integration. ### What are the rate limits on the Avalara AvaTax API? Avalara enforces rate limits that vary by account tier and endpoint. High-volume tax calculation endpoints are designed for real-time checkout use cases and can handle significant throughput, but exact limits depend on your customer's Avalara subscription. Truto handles retry logic and rate-limit backoff transparently. ### Can I use the Unified User Directory API with Avalara AvaTax? Yes. The Unified User Directory API supports Organizations, Roles, Users, and Workspaces, which can be mapped to Avalara account structures — such as companies, user accounts, and permission sets — for managing multi-entity setups. ### How does Truto handle multi-entity or multi-company setups in Avalara? Avalara AvaTax supports multiple company profiles under a single account. Truto can scope API calls to the correct company context, so SaaS platforms serving customers with complex corporate structures can route transactions to the right entity. ### What data does a typical AvaTax transaction require? A CreateTransaction call requires a transaction type (SalesOrder or SalesInvoice), origin and destination addresses, line items with amounts and tax codes, and a customerCode. Optional fields include exemption numbers, currency codes, and custom reference fields.