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# Build intelligent tax compliance workflows

Integrate real-time tax calculation, e-invoicing, and end-to-end compliance into your product with Avalara’s REST APIs and SDKs.

[Get Started ](/docs/ava-tax-quickstart-guides/calculate-sales-tax)

[Explore the API ](/api-reference)

Configure your IDE with MCP servers

Discover Avalara APIs and\
capabilities

Turn tax compliance use case into code

12,000+ Tax jurisdictions 190+ Countries supported 54B+ Transactions per year 200,000+ Customers

## Build your integration

Choose how you want to connect — call the REST APIs directly or get started fast.

[01](/api-reference)

REST APIs

Integrate directly with the AvaTax API for full control over calculation, transactions, and compliance.

[02](/docs/ava-tax-quickstart-guides/calculate-sales-tax)

Quickstart

Authenticate, calculate tax on your first transaction, and commit it — in under ten minutes.

`npm install avalara`

calculate-tax.ts

<pre>
  <code />
</pre>

200 OK totalTax *7.75* · rate *7.75%* · lines *1*

## One platform, several APIs

Avalara's developer platform brings end-to-end tax compliance together in one suite of REST APIs — calculation, e-invoicing, exemption certificates, information returns, and more. Explore the capabilities below, then dive into any API from the reference.

Calculations

Real-time sales, use, and cross-border tax on every line of every order. AvaTax API.

Exemption certificates

Request, validate, and store exemption certificates tied to your customers. CertCapture API.

Compliance data

Manage companies, nexus, items, tax codes, and reports behind your filings. AvaTax API.

E-invoicing

Issue compliant e-invoices and meet live-reporting mandates. Avalara E-Invoicing & Live Reporting API.

1099 & W-9

Collect W-9s and file 1099s with built-in TIN matching and e-delivery. Avalara 1099 & W-9 API.

Communications

Calculate telecom, streaming, and utility taxes at scale. Avalara for Communications API.

## Ready to start building?

Spin up a free Avalara sandbox and make your first API call today.

[Read the docs](/docs)

[Browse endpoints](/api-reference)