Why would you want to do that? That will not get you around the IRS five federal e-file limit. And you cannot download three versions of the desktop software to the same computer. Any version of the desktop software can be used to prepare and e-file up to five federal returns and the state returns that go with them (state e-file fee is extra). If you have more than five returns to fill the extra ones can be filed by mail. You do not need three licenses; it would just be a waste of money.