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Guide: 1099 & W-9
This guide explains how to integrate Avalara 1099 & W-9 into your system, including certification requirements for technology partners.
Welcome to the Avalara 1099 & W-9 integration guide. This guide walks you through integrating Avalara 1099 & W-9 into your system. Each section represents a milestone in the integration process. Complete each milestone before starting the next.
If you’re a technology partner, several milestones include a certification requirements section. This helps you learn quickly what you need to accomplish to earn an Avalara 1099 & W-9 badge. The following types break down the badge requirements:
- Required: We require you to include this design element to become certified.
- Conditional: Depending on your use case, this design element is required.
- Suggested: You don’t need this design element to become certified, but we recommend that your UI includes suggested elements.
Certification doesn’t entail a code review from Avalara. The requirements help you create a straightforward integration for your users and ensure tax compliance.
If you’re an API customer, we recommend that you follow this guide when using Avalara 1099 & W-9 APIs in your own systems.
Tip
Need help getting started? Check out the Quick reference for 1099 integration page for a walkthrough of the key features and how to get started.
Notice
The information provided in this Integration Guide is based on standard practices. It’s up to each individual developer to determine the applicability of such information and to verify the functionality and use of the information. All information, including examples of code, comes with an “As-is” basis. Avalara’s site terms cover use of Avalara’s website and are located here: https://www.avalara.com/us/en/legal/site-terms.html.
Part of the 1099 & W-9 integration guide. Open the full “Get started” milestone on Avalara to see every page in this section.

