AvaTax automates real-time sales and use tax determination across jurisdictions, enabling accurate tax calculation at the point of transaction. It removes the need to manually maintain tax rates, rules, and sourcing logic while keeping systems aligned with continuously updated tax content.

Core capabilities

Calculate sales and use tax during checkout, invoicing, or order processing using jurisdiction-aware logic that reflects current tax rules and boundaries.

Real-time tax determination

Apply consistent tax logic across ecommerce, marketplace, POS, and ERP systems so transactions return accurate totals regardless of where they originate.

Compliance-ready transactions

Validate addresses and map transactions to the correct tax jurisdictions to reduce errors caused by incomplete or inaccurate location data.

Intelligent address and jurisdiction mapping

Support scenarios such as product taxability differences, exemption logic, shipping rules, and temporary tax changes without building custom rule engines.

Complex rule handling

Explore API endpoints, SDKs, integration guides, and MCP capabilities. A 90-day free trial is available for evaluation and sandbox testing.

Getting started

AvaTax integrates through APIs and SDKs, enabling implementation within commerce platforms, billing systems, ERPs, and custom applications. It supports both direct API integration and broader compliance workflows.

How it integrates

What AvaTax solves

When to use AvaTax

AvaTax

View API docs

New ECM Customer

Exemption Certificate Management (ECM), also known as CertCapture, helps you collect, validate, and store exemption certificates in one place. It reduces manual work and keeps certificate data accurate and easy to retrieve for audits.

Collect and apply exemption certificates across online, in-store, and offline sales workflows.

Capture certificates across channels

Let customers upload certificates or enter details to generate and submit new ones.

Customer-friendly upload and collection

Validate certificate data at collection so required documentation is complete and audit-ready.

Reduce non-compliance risk

Apply exemptions when valid certificates exist to reduce rebills, credits, and manual fixes.

Improve billing accuracy at scale

Start with the API documentation and integration guides. Choose the path that fits your setup, new implementation or existing ECM account, then follow the integration steps to enable certificate collection and management.

Integrate ECM into checkout, invoicing, and tax calculation workflows to capture and reference exemption data throughout the transaction lifecycle. Use APIs to submit, validate, retrieve, and manage certificate status.

Exemption Certificate Management

Get Started

Getting the duties and taxes right on cross-border sales is critical for your operations and your customers. Avalara AvaTax Cross-Border makes it easy to sell products anywhere in the world by calculating customs duties and import taxes.

Apply Avalara-maintained tax rules and rates tailored to your product category and jurisdictions.

Industry-specific logic

Support tiered pricing, bundled offerings, exemptions, and multi-jurisdiction calculations without custom engines.

Complex scenarios

Stay current with evolving requirements through regularly updated content and configuration options.

Regulatory alignment

Integrate with billing, ERP, and custom apps using REST APIs built for high-volume transaction processing.

Operational scale

Use API documentation, integration checklists, and environment setup guides linked from each product below. Provisioning and access details depend on your Avalara products and onboarding path.

Avalara APIs provide REST interfaces for billing, subscription, ERP, and custom applications. They support scalable tax determination and high-volume processing so you can embed compliance into your existing workflows.

AvaTax Cross-Border

Are you selling throughout the U.S.? If so, getting registered with the states in which you’re obligated to collect and remit sales tax should be one of your first steps.

Registrations

Avalara Managed Returns API enables partners and platforms to embed tax return preparation and filing into their workflows. It helps automate compliance by allowing businesses to manage returns without leaving their systems.

Enable return preparation, filing, and remittance within partner or platform environments without requiring separate interfaces.

Embedded returns workflows

Consolidate transaction data from ecommerce platforms, marketplaces, and business systems into a unified returns workflow.

Multi-channel data aggregation

Prepare returns and manage payments across jurisdictions through integrated, automated processes.

Automated filing and remittance

Enable partners to extend compliance capabilities to multiple customers while maintaining consistent workflows and visibility.

Scalable partner enablement

Access Avalara Managed Returns API documentation and integration guides in the developer portal.

Setup involves configuring data flows, authentication, and mapping transaction data into returns workflows.

Avalara Managed Returns API integrates through APIs with partner platforms, marketplaces, and ERP systems to ingest transaction data and manage return workflows.

It acts as an embedded layer on top of Avalara Returns capabilities, enabling automated compliance within existing systems.

Avalara Managed Returns API

Avalara Tax Content (ATC) provides centralized, regularly updated tax data to support accurate tax calculation across systems. It delivers jurisdiction-specific tax rates, rules, and taxability logic that integrate with ERP, point-of-sale (POS), billing, and custom applications.

Deliver consistent tax rates, rules, and jurisdiction mappings across systems using a standardized content source.

Centralized tax content platform

Calculate tax in offline or edge environments without real-time API calls. Receive updated tax content to reflect regulatory changes.

Offline and POS-ready tax support with automated updates

Extend tax content with user-defined fields to align with internal data models, reporting needs, or system requirements.

Flexible data model and customizations

Support multiple industry use cases through specialized content models, including retail, lodging, and car rental.

Industry-specific extensions

Access ATC APIs, configuration endpoints, and integration guidance in the developer portal.

Setup involves configuring business locations, selecting content templates, and integrating tax data delivery into downstream systems.

Avalara Tax Content integrates with POS systems, ERP platforms, billing systems, and custom applications by delivering tax data in standardized or system-aligned formats.

Content is delivered through APIs or file-based methods (such as SFTP) and ingested into target systems to support consistent tax calculation workflows.

Start building

Currently maintained libraries for AvaTax