The desktop version allows you to create as many returns as you want. Save the return you have with a name you can understand, for example, Person A. Then save it again but change the name - for example, Mock Federal.
Now you have two matching copies. Go to File (top left) and open whichever return any time to work on it.
Continue and complete, then file your Person A return.
Change up your Mock Federal to match your situation. You may be able to efile the state return. Please read the rules here.
When you go through the review section, you will be asked about Audit Defense.
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