For Online
Please start by going to this TurboTax page.
Scroll down until you see "Learn More" for each product.
Click on any one of the Learn Mores (they will all end up where you want).
Scroll down on the new page until you see
Features Review Tax Forms Requirements
Click on Tax Forms.
Now you will see two tables - between them, they list all the IRS forms and which products support them.
For CD/Download (Desktop)
Go to this TurboTax page.
Scroll down until you see View Forms (under Learn More).
Note that this lists all the possible forms supported by the desktop software.
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