Multiple tax years can be installed on one one computer. However, you cannot have more than one copy of the software installed for the same tax year.
There is no reason to have two copies of the same tax year installed on a computer, unless one is for the personal edition and the other is for the business edition.
You can create, complete and file as many tax returns as required with only one copy of the TurboTax software. Click on the File menu at the top left of the desktop program screen, click on New Tax Return.
