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# Maintain returns

Guide: Avalara Managed Returns API (U.S. and Canada)

Learn how Avalara manages tax notices, including submission requirements, review processes, and client communication.

## Submission requirements

To initiate a tax notice review, provide the following information:

* The return and tax period referenced in the tax notice
* The tax amount, penalties, and interest specified in the tax notice
* An attachment of the official tax notice document issued by the jurisdiction

## Avalara review

After a tax notice is submitted, Avalara performs these actions:

* Researches the tax notice details
* Resolves the tax notice

## Client communication

After submission, the tax notice is accessible to the client through your platform.

* Clients can track the tax notice status
* Comment threads allow communication between the client and Avalara’s compliance team

> **Note**
>
> Part of the **Managed Returns — U.S. and Canada** integration guide. [Open the full "Maintain returns" milestone on Avalara](https://developer.avalara.com/products/returns/integration-guides/managed-returns/poi5042794870464/) to see every page in this section.