It depends.
Each level of the software provides more forms as needed. Please see the following link to determine which version of the software you need.
Forms included in TurboTax products
After you determine what version you need based upon your tax documents, you can either upgrade or lower your level by using the links below as it applies to your particular situation.
Please note, in order to downgrade, you will need to make sure you have not paid any fees yet. You will need to clear and start over to downgrade.
How to downgrade TurboTax to a lower level
How to upgrade levels in TurboTax