If you have already filed the return, you can't go back and change it. But if you have not filed, see this link <a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/replies/5677590">https://ttlc.intuit.com/replies/5677590</a> and it will show you how to get to it under the "File" tab once logged into your return.
