> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://avalara.ferndocs.com/docs/integration-guides/ava-tax-quickstart-guides/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://avalara.ferndocs.com/_mcp/server.

# AvaTax quickstart guides

> API solutions for end-to-end tax compliance.

## Docs

- [Calculate sales tax](https://avalara.ferndocs.com/docs/integration-guides/ava-tax-quickstart-guides/calculate-sales-tax.md): Turn an order into jurisdiction-accurate tax with a single call.
- [Validate addresses](https://avalara.ferndocs.com/docs/integration-guides/ava-tax-quickstart-guides/validate-addresses.md): Normalize and geocode addresses for rooftop-accurate rates.
- [Commit and refund transactions](https://avalara.ferndocs.com/docs/integration-guides/ava-tax-quickstart-guides/commit-and-refund-transactions.md): Move a transaction through its lifecycle so records stay filing-ready.
- [Handle errors](https://avalara.ferndocs.com/docs/integration-guides/ava-tax-quickstart-guides/handle-errors.md): Read AvaTax error responses and retry safely.