> This page is for Documentation, version Integration guides (default).
> For other versions, use one of these documentation indexes:
> - Integration guides (default): https://avalara.ferndocs.com/docs/integration-guides/llms.txt
> - Refactor guides: https://avalara.ferndocs.com/docs/refactor-guides/llms.txt
> - Get certified: https://avalara.ferndocs.com/docs/get-certified/llms.txt
> - Agent to Agent (A2A): https://avalara.ferndocs.com/docs/agent-to-agent-a2a/llms.txt
> - AI use cases: https://avalara.ferndocs.com/docs/ai-use-cases/llms.txt
> - API versioning: https://avalara.ferndocs.com/docs/api-versioning/llms.txt

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

# Design the user experience

Whether you’re a technology partner working to become certified or an API customer, this section describes how you should design your AvaTax application.

Certification for technology partners:

What should your integration's user interface look like? What design elements should you include? For partner certification, this section describes the design elements that are necessary to become certified. We carefully crafted these UI elements to help you create an integration that's straightforward and uncomplicated for your users and to help ensure that your integration is tax compliant.

We've broken the badge requirements down into the following types:

* **Required**: This design element is required to become certified.

* **Suggested**: This design element isn’t required, but we recommend that your UI includes suggested elements.

* **Conditional**: Depending on your use case, this design element may be required.

API customers:

For API customers, following these badge certification requirements isn’t necessary; however we recommend that you follow these guidelines when using AvaTax APIs in your own systems.

> **Note**
>
> Part of the **VAT for Marketplaces** integration guide. [Open the full "Design the user experience" milestone on Avalara](https://developer.avalara.com/vat-marketplace/designing/) to see every page in this section.