Sorry but only YOU can do the ID verification. The MAX package doesn't cover this since it is not an audit.
Follow the notice instructions carefully to complete the task.
If you did not save a PDF of the return when you filed then get it now.
To access your current or prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on Download/print return (PDF)