I received a notice from the IRS regarding my 2018 tax return. I purchased Audit defense when completing my return and am unable to download it - who can help me?

Go to the Tax Audit website and sign onto your account or contact them - https://intuit.taxaudit.com/

You should be able to access the 2018 online tax return.

To access your 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 section Your tax returns & documents.  Click on the Year and Click on Download/print return (PDF)

If you used the desktop CD/Download editions installed on your computer, the only copy of your tax data file and any PDF's will be on the computer where the return was created.  TurboTax does not store online any returns completed using the desktop editions.

Turbotax used to have free "audit helper" software of some kind, but I thought that was discontinued.  "Audit Defense" is a subscription to an actual company with (allegedly) real people to help you.  If you purchased Audit Defense for 2018, you should contact that company directly. 

Whether you get help from Audit Defense or another tax professional, be sure to ask about whether it's too late for the IRS to assess additional tax for 2018. They normally cannot assess additional tax more than 3 years after the tax return was filed, unless the amount of income you omitted was more than 25% of the income shown on the return, or if they think your tax return is fraudulent.